The 6 Best Bike Locks in 2019

6 of the best bicycle locks

Bicycle Security that will beat the thieves

Finding the best lock for your bicycle can be difficult. There’s loads to choose from. And the wrong decision can have disastrous consequences!

The secret to success is choosing a lock that’s both secure enough to protect your bike and easy enough to use on a daily basis.

With that in mind, here are 6 fantastic locks that aim to do just that…

(And if none of them seem quite right, don’t worry, below these picks I’ll show you the three simple steps that will guarantee you find the perfect lock for your needs.)

1. Kryptonite Kryptolok

The Kryptonite Kryptolok Series 2 is the archetypal u-lock and a brilliant budget choice. It’s a practical size and weight and offers good, mid-level (Sold Secure Silver) security for a very reasonable price.
Kryptonite Kryptolok Series 2 best mid-security lock

Kryptonite Kryptolok Series 2 Summary
Overall Score:4 Stars
Check Price:Check Amazon Price
Bar Thickness:13 mm
Weight:2.85 lb (1.29 kg)
Size (internal):4 x 9" (10.2 x 22.9 cm)
Kryptonite Rating:6/10
Other Security Ratings:Sold Secure SilverART 2 Stars

It won’t provide you with the very highest level of protection, but the 13 mm shackle should withstand all but the biggest bolt cutters. It’s very easy to use, comes with a reasonable frame mount and benefits from Kryptonite’s outstanding after sales service.

So, if you’re “Lower Risk” and looking for a dependable u-lock that will fit around almost every bike, this is a great choice.

Read my full, hands-on review of the Kryptolok which includes the best alternatives if it’s not right for you. Or compare it to other u-locks.

2. Abus Granit X-Plus 540

For me, the Abus Granit X Plus 540 is probably the best all round bike lock, of any type, available today!
Abus GRANIT X-Plus 540 best high-security lock

Abus GRANIT X Plus 540 Summary
Overall Score:5 Stars
Check Price:Check Amazon Price
Bar Thickness:13 mm
Weight:3.20 lb (1.45 kg)
Size (internal):4.25 x 9" (10.8 x 23 cm)
Abus Rating:15/15
Other Security
Sold Secure Gold ART 3 Stars

It provides a very high level of security (Sold Secure Gold) and despite being a decent, practical size, it’s still comparatively light. The 13 mm shackle is cast in a patented parabolic square shape from a special type of steel that’s as strong as the much thicker shackles on much heavier locks.

In fact, the Granit X Plus 540 is the lightest, high security, standard sized u-lock available at the moment.

So if you’re “High Risk” and looking for a light weight lock without sacrificing either practicality or security, this could well be the best lock for you.

It’s not cheap, but in my full, hands-on review of the Abus Granit X Plus 540 I suggest some great alternatives if it’s not quite right for you. You can also see how it compares to other standard size u-locks here.

3. Kryptonite Kryptolok 955 Mini

The Kryptonite KryptoLok Series 2 955 Mini is a short, cheap chain which is relatively light and easy to carry wrapped around your seat post.
Kryptonite Krptolock Series 2 955 Mini best mid-security chain

KryptoLok Series 2 955 Mini Summary
Overall Score:3 Stars
Check Price:Check Amazon Price
Chain thickness:9 mm
Weight:3.90 lb (1.77 kg)
Length:21.5”" (55 cm)
Kryptonite Rating:6/10
Other Security Ratings:Sold Secure Silver

With 9 mm links, it’s not the most secure bike lock (Sold Secure Silver), but it offers far more protection than any cable lock. Just keep it as far from the ground as possible to keep it safe from bolt cutters.

So if you’re “Lower Risk” and looking for something practical and reasonably priced to protect a cheaper bike, this could be a good choice for you. I’ve got more about chain locks here.

4. Kryptonite New York Noose 1275

The Kryptonite New York Noose 1275 is great because the noose system almost doubles the usable length of the chain.
Kryptonite New York Noose 1275 strongest portable chain

New York Noose 1275 Summary
Overall Score:4 Stars
Check Price:Check Amazon Price
Chain thickness:12 mm
Weight:6.95 lb (3.15 kg)
Length:30" (75 cm)
Kryptonite Rating:9/10
Other Security Ratings:Sold Secure GoldART 4 Stars

This means it can be quite short which is important since the 12 mm links put this chain at the top limit of what is practical to carry around daily.

However, these 12mm hardened steel links also make it very secure for a portable chain lock (Sold Secure Gold).

So if you’re “High Risk” and looking for a high security, portable chain that you can use every day, this could be the right choice for you. Just make sure you’re OK with the weight first.

You can read my full review of the New York Noose 1275 here which includes a couple of alternatives if it’s not quite the right lock for you. You can also check how it measures up to other 12 mm chains here.

5. Foldylock Compact

The Foldylock Compact is the lightest folding lock that still offers a reasonable level of protection (it boasts a solid Sold Secure Silver rating). What’s more, it’s also the most usable folding lock I’ve ever tested!

Foldylock Compact: Lightest Folding Lock


Foldylock Compact Summary
Overall Score:4 Stars
Check Price:Check price at Seatylock
Plate thickness:5 mm
Weight:2.2 lb (1 kg)
Length:33" (85 cm)
Other Security Ratings:Sold Secure Silver

The Foldylock Compact is 33″ (85 cm) long, which means it has around the same amount of internal locking space as a standard sized u-lock. But because it’s flexible, it should actually give you loads more options when you’re looking for somewhere to lock your bike.

And in fact, at 2.2 lb (1 kg), the only Sold Secure Silver locks that are lighter than the Foldylock are mini u-locks!

Compared to it’s nearest rival the Abus Bordo 6000, the Foldylock Compact is lighter and easier to use. It’s easier to unlock, easier to unfold, easier to get around your bike and comes with a better frame mount. Plus it’s cheaper!

So, if you’re “Lower Risk” and you’re looking for a compact and lightweight alternative to a u-lock, this could be a good lock for you. Read my hands on review of the Foldylock Compact.

6. Abus Bordo 6500

The Abus Bordo GRANIT 6500 is the stronger, heavier brother of the 6000. The folding steel plates are just a fraction thicker at 5.5 mm. But it’s significantly more secure with a Gold award from Sold Secure and 2/5 stars from ART.

Abus Bordo Granit X-Plus 6500 folding lock

Abus Bordo GRANIT X Plus 6500 Summary
Overall Score:4 Stars
Check Price:Check Amazon Price
Panel thickness:5.5 mm
Weight:3.48 lb (1.58 kg)
Length:33.5”" (85 cm)
Abus Rating:15/15
Other Security Ratings:Sold Secure GoldART 2 Stars

It’s 33.5”” (85 cm), which again should give you loads of options when you’re looking for somewhere to lock your bike. And at 3.48 lb (1.58 kg) it’s heavy, but not too heavy.

Sure, it’s heavier and less secure than the Abus GRANIT X Plus 540 230 which I think is the best all-round bike lock available today. But it’s much lighter than any Sold Secure Gold chain lock.

So if you’re “High Risk” and you need more locking options than a u-lock can give you but don’t want to lug around a massive heavy chain, the Abus Bordo GRANIT 6500 could be a very good choice. Read my full, hands-on review here.

How to choose the right lock for you

If none of my top 6 picks seem quite right for you, don’t worry! If you keep reading, I will guide you through 3 simple steps that guarantee you’ll find the perfect lock for both you and your bicycle.

As I’ve already said, the best bike lock won’t just protect your bike. It will also be easy for you to use on a daily basis.

Of course your individual circumstances are very important here. They include how expensive your bike is, where and how you use it, and how much money you can afford to spend.

And that’s a lot to think about! But if we work through these 3 steps it’s actually pretty straightforward:

  1. Choose the right level of security
  2. Choose the right type of lock
  3. Choose the right lock brand.

So in Step 1 we’ll work out what level of security you need and I’ll explain how to find locks that will give you the right amount of protection.

In Step 2 I’ll introduce the various different types of bike locks and show you how to choose one that suits your individual needs.

And in Step 3 I’ll explain how each of the lock brands offers something different so you’re able to choose the right one for you.

Now this is a long guide, so if you don’t have time to read it, I’ve also compressed most of it into a handy infographic

How to choose a bike lock infographic

Ready? OK, let’s get going!

Step 1: Choose the right level of security

The ultimate job of any lock is to stop your bike from being stolen. (Yeah OK, that’s pretty obvious right?!) So the first and most important step is to think about what level of protection you’ll need.

How can I know what strength lock I need?

There’s a whole load of factors that affect this. But answering the questions in the table below should give you a pretty good idea…

QuestionsHigh RiskLower Risk
Where do you live?Big town, city or university campusSmall town or village
Does your bike attract second looks?YesNo
How long do you leave your bike unattended?More than 1 hourLess than 1 hour

If two or more of your answers put you in the “High Risk” column, then you need a lock that will give you a higher level of protection.

While if two or more answers are in the “Lower Risk” column, you might be able to get away with a lower security lock.

How can I know how strong a lock is?

OK, so you’ve got a good idea what level of protection you need. But how can you know which locks will provide that protection? In short, how can you judge how secure a lock actually is?

The first thing to remember is that no bike lock is unbreakable. If a thief really wants to steal your bike, with the right tools and enough time, he can and he will. A bike lock just buys you time. And the better the lock, the more time you get.

Generally speaking, the thicker a lock is, the better it will resist the various tools a thief might use to attack it. For instance, top of their list of favorite tools are bolt cutters.

Bolt cutters vs Bike lock
Bike thieves love bolt cutters!

Chain links and U-lock shackles with diameters of less then 13 mm can be cut with medium sized bolt cutters which many bike thieves will use.

Locks with diameters between 13 and 15 mm can only be cropped by the very biggest bolt cutters. But there are thieves that use these tools too.

But at 16 mm thickness, chain links and U-lock shackles become impossible to cut with any manual bolt cutters.

Bike locks vs Bolt cutters
U-lock / Chain thicknessCan be cut by bolt cutters?
< 13 mmYes (medium size)
13 - 15 mmYes (only biggest 36 and 42")
16 mm and aboveNo

However, unfortunately it’s a bit more complicated than this. The type of steel, the shape and size of the lock, the locking mechanism and the overall build quality will all affect how strong a lock is.

And of course thieves don’t only use bolt cutters. Different tools will try to exploit weaknesses in locks that may be difficult for you to see.

So wouldn’t it be useful, if there were experts that could tell us how secure different locks are? Well, luckily there are:

  1. Online tests
  2. Lock brands themselves
  3. Independent security testers
Online tests are a bit rubbish!

There are tons of different cycling and review websites testing lots of different locks, in order to tell you which ones are the best.

Lock testing tools
Tools used to test bike locks

But they always test small samples and they all use different tools in different ways. So it’s difficult to compare the results. What’s more, they’re not necessarily attacking the locks in the same way a thief would.

In fact, beyond “all cable locks are rubbish” and “an angle grinder will cut through anything eventually” the conclusions they draw are neither certain nor particularly useful.

And there are actually some pretty dodgy recommendations made on some very high profile websites. For example I think the top rated lock on is one of the worst bike locks I’ve ever seen. So generally, I don’t trust them!

Lock brand ratings are confusing!

All the good brands provide their own rating systems for grading the security of their locks and these are useful for choosing a lock from that one manufacturer.

Different lock brand security ratings
Kryptonite, OnGuard and Abus all use different security ratings. Confused?

But they’re all very different so they’re no use if you want to compare locks from different brands.

Independent security ratings are best!

Luckily, there are also independent, third party experts that use standardized methods to test and then rate a wide range of different locks according to their security.

Sold Secure from the UK provide a Gold, Silver or Bronze rating based on how long a lock can withstand an attack. And of all the testers, they rate by far the biggest number of locks.

Sold Secure Ratings
Sold Secure rate locks from Gold to Bronze depending on how long they take to defeat.

They use a huge variety of tools and methods in their tests including screwdrivers, junior hacksaws, pliers, stilsons, steel tubes, ball-peign hammers, HSS hacksaws, punch sets, club hammers, TCT hacksaws, freezing agents, cold chisels, 24″ wrecking bars, scissor jacks, slide hammers and lock picking tools.

I’m not actually sure what some of those tools are to be honest!

And they also have close links with the police and insurers which means they get up to date information on the techniques used by thieves and can test the locks accordingly.

ART from Holland are the other big tester and they offer a 1-5 rating (5 being the strongest) based on a whole variety of tests performed by both machines (tensile strength, torsion strength, cutting, corrosion, dust and freeze tests) and by test engineers (brute and intelligent attack tests).

ART Security Ratings
ART use a 1-5 star system and are more strict but rate less locks than Sold Secure

Neither of these groups rate all the available locks and there has recently been criticism of some of their techniques. However, I think they remain the best comparative measure of security when choosing a lock.

What’s more, in the UK at least, most insurance companies will require that your bike is secured with a lock that’s rated by Sold Secure and the level of cover you receive will depend whether the lock has a Bronze, Silver or Gold rating. If you don’t use a lock that is rated by Sold Secure, they won’t cover you.

So, considering this and the numbers of locks they test, as a general rule, I recommend that you use the Sold Secure ratings to judge how secure a lock is.

If you are “High Risk” according to the table above, choose a Sold Secure Gold lock. If you are “Lower Risk”, choose a Sold Secure Silver lock.

I don’t recommend locks that are Sold Secure Bronze under any circumstances. Sure, if you live in a very low risk area, you might be able to get away with a Bronze rated lock. But they provide very little real protection. And I don’t feel comfortable recommending locks to you that are so easy to defeat.

And really, there’s such a huge range of different types of locks at different weights and prices, you should be able to find one that’s rated Sold Secure Silver or better that will suit your needs.

So, the bottom line is:

If your risk level is:High RiskLower Risk
Your lock security rating should be:Sold Secure GoldSold Secure Silver

It’s worth noting that in order to receive a rating from Sold Secure, a lock must be submitted by the manufacturer. And since they don’t submit every lock, there are some that would be worthy of a Silver or Gold rating that aren’t currently rated.

This is where the in-house rating comes in handy. For example, if one OnGuard lock has a Sold Secure Silver rating and a 63/100 OnGuard rating, you can be pretty confident that all their locks with 63/100 are Sold Secure Silver standard.

Of course this is no use if your insurance policy specifies locks that have a Sold Secure rating. But if you don’t take out insurance, it’s a useful way to find a Sold Secure Silver or Gold standard lock even if it doesn’t have an official rating.

Step 2: Choose the right type of lock

This is almost as important as Step 1. Because the type of lock you choose will determine how easy it is to use. If it’s difficult, you’ll stop using it. And that’s when your bike will be stolen!

So it’s important you don’t choose a lock that’s too heavy or too small, that’s difficult to carry, complicated to secure or severely limits the places you’re able to lock your bike.

Obviously this will depend on your individual circumstances. But if we look at the advantages and disadvantages of each type of lock it should quickly become clear which is the best one for you.

There are four, well established types of bike lock to choose from:

1. U-locks2. Chain locks3. Folding locks4. Cable locks
Abus U-mini 40kryptonite-new-york-chainAbus Bordo 5700 folding lockKryptonite Cable lock

And each of these locks offers a compromise between three fundamental qualities:

  1. Price
  2. Practicality
  3. Security

The important qualities of bike locks

The main thing to notice here is that while U-locks, chain locks and folding locks all offer a reasonable balance of price, practicality and security, cable locks don’t. Yes, they might be cheap and they might be easy to use but they offer very little security…

Do not buy a cable lock!

But to work out which one of the others is best for your needs, let’s look at each one in more detail…

U-locks / D-locks

A U-lock (also known as a D-lock) is like a giant padlock that fastens around your bike.

Abus U-mini 40

U-locks: The pros and cons

  • cheaper than chain locks

  • lighter than chain locks

  • complicated to transport

  • won't fasten around bigger objects

Good U-Locks provide a nice balance between price, practicality and security. They are generally cheaper, lighter and a bit easier to use than chain locks, while still offering a high level of protection.

Because of their rigidity they can be more challenging to transport than chain locks. And their limited size means you’ll find less things you can secure your bike to. However, in general, if you’re only going to buy one bike lock, these are the locks I would recommend.

They range in price from around $30 / £18 for a decent budget lock, up to $100 / £60 for the most secure models, so you should be able to find one to suit your wallet.

However, there are a number of things you need to think about carefully when buying a U-lock, including which size and thickness you need and how you’re going to carry it around.

You can also read lot’s more about the best U-locks here. Or compare the locks in a big table of the most popular U-locks here.

The Most Secure U-lock: Kryptonite Fahgettaboudit Mini

The New York Fahgettaboudit Mini is quite simply the most secure (Sold Secure Gold) portable bike lock available today.
Kryptonite Fahgettaboudit Mini

New York Fahgettaboudit Mini Summary
Overall Score:4 Stars
Check Price:Check Amazon Price
Bar Thickness:18 mm
Weight:4.55 lb (2.06 kg)
Size (internal):3.25 x 6" (8.3 x 15.3 cm)
Kryptonite Rating:10/10
Other Security Ratings:Sold Secure GoldSold Secure Motorcycle GoldART 4 Stars

It’s small. It’s heavy. And it doesn’t come with a frame mount. But the 18 mm shackle means this lock cannot be defeated by hand tools. Even power tools will take a good long while to get through this lock!

So if all three of your answers were in the “High Risk” category in the table further up the page and you’re looking for the very highest level of protection, this could well be the best bike lock for you.

It’s not for everyone though. You can read my full review of the New York Fahgettaboudit Mini here, including several alternatives if it’s not right for you. And you can also see how it compares to other mini U-locks here.

Chain locks

Chain locks usually consist of a long metal chain (covered by a sleeve to protect your paintwork) and a big lock.

Kryptonite New York Chain

Chain locks: The pros and cons

  • easier to transport than U-locks

  • fasten around more objects than U-locks

  • very heavy

  • expensive

We can divide chain locks into two broad groups:

  1. those that are light enough to be portable (< 12 mm)
  2. those that are so heavy they are best as stationary security (> 12 mm).

Portable chains are easy to transport wrapped around your seat post and their relative length means you can secure your bike to a wide range of objects. However these chains will generally be no more than 12 mm thick and are not as secure as good U-locks. And they are still much heavier than U-locks.

A super thick, core hardened steel chain with a heavy, top quality lock is perhaps the most secure way to lock your bike. However these chains are so heavy and cumbersome, that they generally work best as a second, stationary lock which you leave wherever your bike is regularly secured for long periods of time.

Chain locks range in price from around $45 / £26 for a short, budget model up to $500 / £200 for the thickest, heaviest monsters. So they’re also a bit more expensive than U-locks.

As with U-locks you should think carefully about what size and thickness you need and how you will carry it about if you need a portable chain.

You can read more about the best chain locks here. Or compare the locks in a table of the most popular chain locks here.

The Strongest Static Chain: Kryptonite New York Legend 1515

Really, Pragmasis and Almax make the strongest chain locks available today. But since they are not easily available worldwide, the Kryptonite New York Legend Chain 1515 is probably the most secure bike chain that is.
Kryptonite New York Legend 1515 best high-security chain

New York Legend 1515 Summary
Overall Score:4-half-stars
Check Price:Check Amazon Price
Chain thickness:15 mm
Weight:15.95 lb (7.23 kg)
Length:60" (150 cm)
Kryptonite Rating:10/10
Other Security Ratings:ART 5 Stars

With 15 mm links it’s certainly not portable. This is a lock that stays wherever you lock your bike all day or overnight.

But if you’re “High Risk” and looking for the most secure chain from a recognizable brand, this may be the best bike lock for you.

Read my full review of the New York Legend Chain 1515 here where I also compare it to the alternatives. You can also see how it compares to other heavy duty bike chains here.

Folding Locks

Folding locks are made up of a series of metal plates linked together by rivets. The rivets allow the plates to rotate so they can be folded into a tight package and then folded out to make a stiff shape that you can fasten around your bike.

Abus Bordo 5700 folding lock

Folding locks: The pros and cons

  • very easy to transport

  • practical length

  • limited choice

  • doubts over durability

Folding locks are generally a little bit lighter than U-locks that offer similar levels of security. And their length and flexibility mean that you’ll usually have more options than you’d get with a standard sized U-lock when you’re looking for somewhere to lock your bike.

But the best thing about these locks is the way they fold down to make a very compact package that’s super easy to transport. The carrying holster can either velcro around your frame or even better, screw into your bottle holder holes.

Abus Bordo attached to bike frame
Folding locks are really compact and easy to transport!

And because it’s so compact, it won’t work loose, swing about or generally interfere with your ride in the way that U-locks sometimes do.

I don’t think they’re as easy to use as a U-lock or chain: unfolding them and then getting them around your bike and the object you’re securing it to can sometimes be a bit of a pain. And because of their comparatively complex build, I have some doubts about how well they’ll continue to perform after a thief has tried (and failed) to defeat them.

But if you’re fed up of under performing U-lock frame mounts, folding locks are a fantastic alternative.

Up until recently, Abus have dominated the market in folding locks. Indeed, many of the folding locks from other manufacturers offer dubious levels of security. However, Seatylock now produce folding locks that have been rated by Sold Secure too.

Cable locks (are rubbish!)

Cable locks are normally made up of many strands of long, thin steel, braided together inside a plastic tube.

Kryptonite cable lock

Cable locks: The pros and cons

  • long
  • light
  • cheap

  • your bike is not safe!

They’re light, flexible and generally cheap. However, this flexibility means that they’re also soft and almost all cable locks can be cut with a pair of hand held cable or bolt cutters in a matter of seconds.

And since the one tool that every every bike thief carries is a pair of cable cutters, cable locks offer very little practical security.

Bike thieves specifically target these locks and in fact, some reports suggest than 90% of all stolen bikes were secured with cable locks.

So by not buying a cable lock you are already massively reducing the chances of your bike being stolen!

You can now buy armoured cable locks which protect the cable by surrounding it with a series of articulated steel barrels. These do offer a higher level of security than regular cable locks. But they are much less flexible and are often as heavy and expensive as chain locks. And what’s more, they are still not as secure as a good U-lock or chain lock.

The Abus Steel-O-Flex 1025 for example, is probably the best armoured cable lock available today. But it weighs 4.3 lb (1.9 Kg), is really expensive and there are numerous reports of it being cut.

Some people recommend cable locks as a supplementary lock to secure your wheels or saddle. However there are much better ways to secure your wheels and saddle and I really wouldn’t recommend any cable locks in any circumstances.

In fact, we can find all the advantages of cable locks in other, much more secure locks. Admittedly not all at once, but at least these other locks will protect your bike!

To illustrate this I have selected three locks below that compete well with cable locks in terms of weight, length and price. The first is a great lightweight U-lock. The second is a lengthy, but not too heavy chain. And the third is a small, lightweight and super cheap U-lock.

Lightweight alternative to Cable Lock: Kryptonite Messenger Mini

The great thing about the Kryptonite Messenger Mini is that it’s small and very light, while still remaining reasonably secure.

Kryptonite Messenger Mini


Kryptonite Messenger Mini Summary
Overall Score:4-half-stars
Check Price:Check Amazon Price
Bar Thickness:11 mm
Weight:1.83 lb (0.83 kg)
Size (internal):3.75 x 6.5"” (9.5 x 16.5 cm)
Kryptonite Rating:7/10

Although the shackle is just 11 mm thick, it’s made from a special “Max Performance” steel which makes it as strong as Kryptonites other 13 mm shackle U-locks.

And this thin shackle means it weighs just 1.83 lb (0.83 kg) which is about the same as two cans of coke.

While Sold Secure have not yet rated it, Kryptonite give it a 7/10 which is the same rating as it’s highly regarded (Sold Secure Silver) Evolution range of U-locks.

It’s not actually the lightest Sold Secure Silver standard U-lock available. The lightest is the Kryptonite Evolution LITE Mini-6, but the Messenger is slightly bigger making it a bit more practical.

So, if you’re a “Lower Risk” according to the table in Step 1, and attracted to cable locks because they’re so light, then maybe this mini U-lock could be the lock you’re looking for!

You can check out how it compares to other small, light U-locks here.

Practical alternative to Cable Lock: Abus Iven Chain

The Abus Iven Chain 8210 85 is the closest you can get to a cable lock in terms of form and function while still offering a reasonable level of security.

Abus Iven chain 8210 85

Abus Iven Chain 8210 85 Summary
Overall Score:3-half-stars
Check Price:Check Amazon Price
Chain thickness:8 mm
Weight:4.26 lb (1.934 kg)
Length:33.0”" (85 cm)
Abus Rating:10/15
Other Security Ratings:Sold Secure SilverART 2 Stars

It’s 33.0”” (85 cm) long which will give you loads of options when you’re looking for somewhere to lock your bike.

And while at 4.26 lb (1.934 kg) it’s not super light (that’s about the same as 5 cans of coke), it’s still one of the lightest Sold Secure Silver chain locks available. (The other being the Hiplok v1.50). You can see how it compares to other chain locks here.

So, if you’re “Lower Risk” in the table at the top of the page and attracted to cable locks by their practical length, maybe this chain lock will suit your needs while also actually protecting your bike!

Cheap alternative to Cable Lock: OnGuard Bulldog

Finally, the Bulldog Mini from OnGuard is small, light and incredibly cheap!

OnGuard Bulldog Mini


OnGuard Bulldog Mini Summary
Overall Score:3-half-stars
Check Price:Check Amazon Price
Bar Thickness:13 mm
Weight:2.15 lb (0.98 kg)
Size (internal):3.55 x 5.52" (9 x 14 cm)
OnGuard Rating:63/100

It’s essentially a smaller version of the OnGuard Bulldog DT which is one of the best standard sized budget bike locks around.

While Sold Secure haven’t tested the Mini, it’s bigger brother gets a very respectable Silver rating and since it has the same 63/100 in house rating from OnGuard, it’s safe to assume it offers the same level of protection.

And what’s great about these Bulldog locks is the price. Usually less than $30 / £20 it offers good protection at an exceptional price.

So, if you’re “Lower Risk” and attracted to the low prices of cable locks, you’ve got no excuse: the OnGuard Bulldog Mini is also really cheap, but will protect you bike much, much better.

Check out how it fares against other mini U-locks here.

Innovative Locks!

These locks tend to be born in the minds of maverick individuals and initially funded through the pages of crowdfunding websites such as Kickstarter. There’s loads of locks to solve loads of problems and they often have little else in common beyond their innovation!

Innovative locks: The pros and cons

  • address known issues with other locks
  • use new technology

  • expensive
  • largely untested

Unfortunately many of them have neglected to prove their security credentials (which should really be a priority if you’re trying to sell us a new form of security) and have consequently not been tested and rated by Sold Secure or ART.

However, there are some that have been tested and rated very highly by third parties. So here’s a couple of the best, which I’ve also tested and reviewed myself…

Lightest Mid-Security Lock: TiGr Mini

The TiGr mini is something completely different. It’s made from a single length of titanium, shaped into a bow and secured with a clever steel cylinder.

TiGr mini: Lightest mid-security bike lock

TiGr mini Summary
Overall Score:4 Stars
Check Price:Check Amazon Price
Plate width:1.25" / 32 mm
Weight:0.9 lb (0.4 kg)
Size:4 x 7" (10 x 18 cm)
Security Ratings:ART 2 Stars

It’s an incredibly elegant design, which uses the natural flexibility of titanium to produce a single piece of metal that’s able to spring open and then close around your bike. It’s also probably the best looking bike lock I’ve ever seen!

The TiGr mini has been tested and rated by ART who awarded it 2/5 stars. And this makes it a Sold Secure Silver standard lock at the very least.

It’s not cheap. But at 0.9 lb (0.4 kg), it’s 50% lighter than the next lightest lock offering similar levels of protection! The frame mount attaches in the same way as your water bottle cradle, so it’s really easy to carry too.

It’s not a lock for super high risk circumstances. But if weight and pure elegance is a priority, then this is a great choice for a lower risk area. Read my full review of the TiGr mini here.

Lightest High-Security Lock: Litelok

The Litelok looks (and works) like a big belt. The strap is made from a special material they call “Boaflexicore” which is both very strong and very light. And the two piece, plastic covered buckle is held together by a 9 mm bolt.

Litelok: lightest high-security lock


Overall Score:4 Stars
Weight:2.47 lb (1.12 kg)
Length:29" (74 cm)
Width:2.5" (6.5 cm)
Security Ratings:Sold Secure Gold

The Litelok has been tested by Sold Secure who have given it a Gold rating. And since the Litelok weighs just 2.5 lb (1115 g), this makes it one of the lightest high security locks currently available.

In fact, the only Sold Secure Gold lock that’s lighter than the Litelok is the Abus 401 which is a mini u-lock which will offer far fewer options when you’re looking for somewhere to lock your bike.

In fact, at 29″ (74 cm) in length, the Litelok actually gives you more internal space than a standard sized u-lock, so you’ll be able to lock your bike in places where you might otherwise struggle even with a normal u-lock!

It’s quite stiff so it’s not as easy to get round your bike as you might think and it’s a bit bulky if you want to carry it in a bag rather than strapped to your frame. It’s not cheap either!

But the Litelok is a great choice if you want a light weight lock but are not prepared to sacrifice either security or locking options when you’re out and about. Read my full review of the Litelok here.

U-locks vs Chain locks vs Folding locks

So if we all agree that cable locks are rubbish, how do we choose between a U-lock a chain lock and a folding lock?

U-lock vs Chain lock vs Folding lock

I talk about the pros and cons of U-locks and chains in much more detail in the U-lock vs chain lock page.

But to summarize here: if you’re looking for a lock that you can carry around with you every day, then a U-lock is generally the better choice. U-locks provide the nicest balance between security, practicality and price. So they are usually lighter, cheaper and more secure than portable chains.

Of course, there may be good reasons to choose a chain over a U-lock. For instance, maybe you need the greater locking options that a long chain offers. Or maybe you don’t like the frame mounts that come with U-locks and prefer the ease of wrapping a chain round your seat post. But in most cases, U-locks are the best option for portable security.

If on the other hand you’re looking for a lock that stays in one place, at home or at work, then a big, heavy chain is the better choice. A thick chain with a strong lock provides the highest possible level of security for your bike.

They are more difficult to attack with power tools, impossible to bolt crop and immune to bottle jack attacks. You can secure multiple bikes with one chain. And they also work well with good ground anchors. Just don’t try to take them with you when you nip to the shops!

But what about folding locks? Just like U-locks, folding locks are best suited to mobile security. And they address two of the main problems that we can face with U-locks: their limited size and how difficult they can be to carry around on your bike.

Because they are longer and more flexible, you will find more places you can lock you bike up. And because they are so compact when folded up, they are much easier to transport. They also compete well with U-locks in terms of weight.

Since only Abus and Seatylock make decent quality folding locks you’re very limited in your choice. But if you have specific needs that U-locks don’t meet, then consider a folding lock before a chain lock.

Step 3: Choose the right lock brand

So, by now you should know what level of security you’re going to need and have a good idea which type of lock is most appropriate. The final step is to decide which lock brand suits you best.

There are obviously many, many bike lock brands. But the big three are Abus, Kryptonite and OnGuard. And not only do these three generally provide the best quality, I think that between them they also cover most peoples needs.

To give some of the others honorable mentions, Squire make some good quality locks. I like the U-locks from Hiplok and the Pentagon from Seatylock.

However, here I’m going to concentrate on the big three: Abus, Kryptonite and OnGuard.

Abus vs Kryptonite vs OnGuard

I look at the three brands in much more detail in the Abus vs Kryptonite vs OnGuard page (which includes a very detailed review of the different “Anti-theft Protection” schemes). But I’ll also provide a quick summary here.

Abus vs Kryptonite vs OnGuard

Abus produce the best quality locks. They are well made, endlessly tested, very reliable (even in poor weather conditions) and will last a long time. They also have the best strength to weight ratio. However, they’re the most expensive of the three brands.

Kryptonite also produce high quality locks. While not quite up to the standard of Abus, they make up for this with exceptional customer service. This includes free key and lock replacement in certain circumstances and the best of the anti-theft protection schemes.

OnGuard have had a slightly poorer reputation for both quality and particularly customer service. However, in recent years they have significantly improved the build quality of their locks. And they beat both Abus and Kryptonite in terms of price. OnGuard locks are nearly always the cheapest of any locks at the same level of security.

So if you want the very best quality go for Abus, if your looking for the best price go for OnGuard and if your looking for the best customer service go for Kryptonite!

The best bike lock: A summary

OK, this is a very long guide. A quick summary might be useful. Follow this simple 3 step process to find the best bike lock for your circumstances:

Step #1: Choose the right level of security

The best way to judge the security level of a lock is to look for a Sold Secure rating. Sold Secure award locks Gold, Silver or Bronze ratings, based on how long they take to defeat.

How do you know which rating you need? Just answer the questions in the table below.

QuestionsHigh RiskLower Risk
Where do you live?Big town, city or university campusSmall town or village
Does your bike attract second looks?YesNo
How long do you leave your bike unattended?More than 1 hourLess than 1 hour
Your lock security rating should be:Sold Secure GoldSold Secure Silver

If two or more answers put you in the “High Risk” column you should probably look for a lock that’s Sold Secure Gold or equivalent.

If two or more answers put you in the “Lower Risk” column then you can probably get away with a lock that’s Sold Secure Silver or equivalent.

Step #2: Choose the right type of lock

There are four main types of bike lock:

1. U-locks2. Chain locks3. Folding locks4. Cable locks
Abus U-mini 40kryptonite-new-york-chainAbus Bordo 5700 folding lockKryptonite Cable lock

Cable locks are utter rubbish. Whatever you do, don’t buy a cable lock, it won’t protect your bike! One last time:

Do not buy a cable lock!

If you’re looking for a portable lock that you’ll carry around on your bike every day, you’re probably best off with a U-lock or a folding lock.

U-locks offer a great balance of price, practicality and security. And there’s a huge variety of sizes, weights, security levels and prices and to choose from, so you’ll nearly always find one that meets your requirements.

However, in some circumstances, the limited size and rigid shape of U-locks can make it difficult to find places to lock your bike. And the frame mounts that come with U-locks are often frustrating to use.

In these cases, a folding lock is a good alternative. The extra length and flexibility will give you more options when you’re looking for somewhere to secure your bike.

And because they fold up to such a compact size, they’re easy to attach to your frame and don’t interfere with your ride. They’re also much lighter than chains!

However, since Abus and Seatylock are the only companies making decent folding locks you’re pretty much limited to the two locks I review above!

If you don’t think U-locks or folding locks will meet your needs, then a portable chain could be the answer. But be aware, chains that offer a decent level of security are much heavier than U-locks or folding locks.

However, if you’re just looking for a stationary lock to keep wherever you leave your bike for long periods of time, then a thick chain is the best choice.

Not only are the very thickest chains the most secure way to protect your bike, they also work better with ground anchors in shed and garages.

Step #3: Choose the right lock brand

There are so many lock brands to choose from these days. And a lot of the locks are of both poor build quality and low security.

To keep it simple, I like to stick to the big three: Abus, Kryptonite and OnGuard. And I honestly think that between them, they can provide something for everyone.

If you want the very highest quality then go for Abus. Just be aware that you’ll pay a little bit more.

If you’re on a tight budget, then OnGuard locks are usually the most competitively priced. Just bear in mind that their customer service is not always so hot!

And If you want the very best customer service go for Kryptonite. The quality is not quite as high as Abus and the prices are not quite as low as OnGuard but the after sales service is second to none.

Making the final decision

If you’ve followed the three simple steps you should now be well equipped to choose the best lock for both you and your bicycle. But in case you’re still not sure…

If you’re thinking that a U-lock is the way to go, but you’re not sure about sizes, check out this guide. Once you’ve got a better idea which is appropriate, you can compare loads of different U-locks in this table.

If you’re leaning towards a folding lock, then it’s probably just a case of choosing between the different Abus models above.

And if you’re thinking a chain lock is the best option, then I have a more detailed guide here and a huge comparison table here.

How much money should I spend on a bike lock?

It’s the same as anything else really. Generally, the more money you spend, the better quality the lock and the more difficult your bike will be to steal.

How much money should I spend?

Many lock brands suggest spending 10% of the value of your bike on your lock. But if you have a $200 bike and you only spend $20 on the lock, you’re asking for trouble.

So I recommend you spend as much as you can. This will give you the best protection you can afford. And it will also give you the peace of mind that you’ve done the best you can to protect your bike.

And don’t forget: a good bike lock can last many years and many bikes. Maybe you’ve got a cheap bike now but if you upgrade to a better bike in a couple of years, you wont need to shell out again for a better lock as well!

I know that buying a bike lock is not very exciting. And it’s galling that you have to spend so much money to protect your stuff. But a cheap lock is a false economy. Because when your bike is stolen, you’ll have to buy a new bike and a new, better lock.

I learned the hard way, but surely it’s better to get it right first time!

Do I need more than one lock?

Possibly. In most cases one lock is only going to secure the frame and one wheel. What about the other wheel? What about your seat? If you don’t want to lose them, these should be secured too.

The safest way to protect your second wheel is a second lock. And there’s also an argument that a second lock of a different type to the first will further deter a thief because they’d need to carry two different types of lock breaking equipment.

Bike locked with chain and U-lock
Two different locks = highest security. But they’re heavy and difficult to carry.

However even a small, decent second lock will significantly increase the weight you’re carrying around and you’ve also got to find space in your bag or on your frame for that extra lock. And this can be a real pain!

So in most cases I’m now recommending that you use secure skewers rather than a second lock. Whereas not quite as secure as another u-lock, security skewers and bolts have a whole load of other advantages…

IXOW gravity based Wheel Skewers use a regular hex key
Secure skewers are a much more practical option

First of all they’re much, much lighter. And of course because they’re already attached to your bike, you don’t have to worry about how you’re going to carry them around anyway.

Secondly, you don’t have to go through any extra locking up steps. They’re always securing your stuff. This makes locking your bike much quicker and easier. Anyone whose ever wrestled with one of those thin cables (which won’t protect your wheel anyway) know what I’m talking about.

And thirdly, because you don’t have to worry about your wheels, you can get a smaller, lighter primary lock and actually keep it further from the ground where it’s much safer from attacks. So your whole bike is actually more secure.

This is especially useful if you’re using a chain as your primary lock. If you only have to secure your frame, you can use a much shorter chain, which will be much lighter. And wrapped tightly around your top tube it will far enough from the ground to be safe from bolt cutters.

4 mm, 5 mm and 6 mm Hexlox
Hexlox can be used to protect anything that’s attached to your bike with a hex bolt

You can get secure skewers and bolts for pretty much every component on your bike. They’re not super cheap but they’re no more expensive then a decent mini u-lock. And they’ll make your life much easier. Read much more about wheel and seat protection here.

What next?

Once you’ve bought a lock, don’t forget to look after it! Clean it with WD-40 and lubricate it with TriFlow or Finish Line every few months, and it will last many years and maybe many bikes too! But if it does get stuck, check out my guide to fixing a jammed lock here.

And, please check out the rest of the site…

I have tips on how to prevent your wheels and seat being stolen including both DIY techniques and secure skewer reviews.

I have the ultimate guide on how to lock your bike properly, where I talk about street, work and home security as well as recommending some good ground anchors.

I have article on how to choose the best bike insurance including a discussion of whether we even need it and an investigation of the various alternatives.

And let me know what you think of the site. What do you think of the locks I recommend? What locks do you currently use? Do you have any tips or tricks I haven’t mentioned? Let me know below…

152 thoughts on “The 6 Best Bike Locks in 2019

  • March 7, 2016 at 4:11 pm

    This was so helpful! Thank you.

    I’ve now ordered an abus bike lock. You made it much easier to decide what I needed.

    • March 7, 2016 at 10:03 pm

      Great stuff Gina! It’s hard to go wrong with an Abus…

  • March 14, 2016 at 8:52 pm

    Thanks for the clarification! It’s difficult to decide if you have no experience with bike locks.

    Just bought two different Abus locks . The bordo Granit 6500 and the Granit X plus 540/30.

    And thinking of getting a theft insurance as well.

    • March 15, 2016 at 6:01 pm

      Great choices Marcel! They’re both very tough locks. Theft insurance is also a very good idea. I’ll be covering insurance in a further update.

  • March 22, 2016 at 12:57 am

    Seriously GREAT info here. Thanks for all the outstanding research, and guidance! I can now put down the bottle of Excedrin… and pick up a bottle of AleSmith X. Cheers to you, Carl!

  • March 24, 2016 at 2:02 pm

    Hello! What are your thoughts about the Illumilock U Lock? It seems like a very handy idea but not sure in terms of security?

    • March 25, 2016 at 10:02 am

      Hi Fran

      I think it’s a really nice idea! But I’m very dubious about the security level (and durability) this lock offers. Especially at such a cheap price. My advice: go for a more traditional U-lock from a reputable brand and separate lights.

      I hope that’s helpful.


  • April 7, 2016 at 8:04 am

    Why no mention of “armored” cable locks such as the onguard rotweiler series? I own the 8024 25mm by 4 feet. This lock feels very strong with the hardened steel. Im thinking this must be as strong, if not stronger than the whimpy 9mm chain locks you mention on this page.

    • April 7, 2016 at 9:41 am

      Hi Brad,

      These “armored cable locks” might look and feel very strong, but beneath the outer shell there’s a very weak cable.

      And getting past the armored links isn’t that difficult as they move about leaving slight gaps that can be exploited. In fact, I think they can be bolt cropped pretty easily.

      All the OnGuard Rottweiler locks are Sold Secure Bronze. And to me, this indicates they don’t offer enough protection.


  • April 11, 2016 at 12:34 pm

    Hi, thanks for a great guide, really helpful!

    Do you have any experience with the Knog Strongman? It also have a Sold Secure Gold rating, weights just above 1 kg, and is cheaper than the Abus Granit X 540..seems like a good choice?


    • April 11, 2016 at 8:10 pm

      Hi Christoffer,

      No I haven’t had any experience of the Knog. It looks good though. As you say: Sold Secure Gold. And 3/5 from ART which is also very impressive. There seems to be some concerns about the weather proofing though. I’ll check it out and try to write something about it in the coming weeks.


      • April 29, 2016 at 2:52 am

        i would also be interested to hear your thoughts on this lock

  • April 23, 2016 at 7:58 am

    Hi Carl,

    I’m trying to choose between a Kryptonite Evolution Series 4 and an Abus Granit 460 – the longer version of either. The Evolution has a higher Sold Secure rating, however I’m wondering about the holder for either one… does the holder last and is it not wobbly? Thankful for any tips.


    • April 23, 2016 at 9:54 am

      Hi Paul,

      I’ve used both the Transit FlexFrame-U holder that comes with the Kryptonite and the USH holder that comes with the Abus. Personally I found the Abus holder to be much better. It’s more robust and the lock actually locks into it. So as result everything is more stable.

      They’re two very different locks though. The Abus is only Sold Secure Bronze so I wouldn’t recommend it at all. If you don’t mind me asking, why are choosing between a Gold and a Bronze rated lock?


      • April 23, 2016 at 4:57 pm

        I’m worried that whichever lock I get, the holder is eventually going to end up failing, and that perhaps the holder by itself is not easily replaceable. Perhaps I worry too much!

        • April 23, 2016 at 5:03 pm

          You can buy both holders separately.

      • April 24, 2016 at 1:49 pm

        I was looking at those two because here in Hungary, the Long Shackle models are priced similarly in certain webshops. I think I will try the Kryptonite and see how the holder fares.

        • April 24, 2016 at 6:15 pm

          Ahh OK, well the Kryptonite is certainly the better lock of the two!

  • June 8, 2016 at 8:28 pm

    Let me ask you for an opinion. I’m about to buy one of the OnGuard gold-ranked U-locks, so the choice is between Pitbull and Brute models. I have some contradictory, and probably very common, arguments for both of them, namely while Pitbull STD is more comfortable in both weight and length, Brute STD is just stronger. I would say Pitbull is secure enough unless I had read here that it is possible to cut through 14mm U-locks with bolt cutters. As it is a basic form of attack, this seems an essential matter. Please, tell me, would you feel safe securing your bike with OnGuard Pitbull? To be more specific, imagine that you leave your bike for about an hour in a big city.

    And yep, I understand that really big bolt cutters are necessary to do that and that it is hard to hide such a tool. I simply doubt that people would react just because someone is walking around with bolt cutters. At last, having bolt cutters is legal, isn’t it? So, a guy with huge bolt cutters probably would alarm the staff of safeguarded parking spaces, but in general public areas it is likely that nobody would react.

    I have found the following movie:
    where 14mm-thick Kryptonite Evolution series 4 disc lock is attacked with really huge bolt cutters with negative result. How reassuring 🙂 However, you claim that it is possible to cut 14mm steel rod with bolt cutters. Have you seen any tests proving that this indeed can happen? Do you know any cases like that from your experience?

    And, what about the “Kryptonite is higher quality” issue? Do you know any tests proving or disproving that the Kryptonite steel is in any sense better than that of OnGuard? I have found one test disproving it by failed attempts to cut through Kryptonite Evolution and OnGuard Pitbull with use of both bolt cutters and hacksaw, but the authors themselves admit that they are very amateur in their tests (the cheapest hacksaw and no thievery skills).

    • June 8, 2016 at 9:20 pm

      Actually, on this video guys cut an Abus Mini lock with 30” bold cutters. Isn’t the lock in the movie a 14mm, Sold Secure Gold lock?
      On the other hand, here they try to do the same with Krytonite Evolution Mini (13mm thing Sold Secure Silver, if I’m right) and they fail (however here they don’t seem to try that hard as in he previous case):

      Is that Abus shackle a botch, or what?

      • June 9, 2016 at 5:51 pm

        No that Abus Mini 40 is Sold Secure Silver. And as you say the Kryptonite Evolution Mini is Silver too. I’m still surprised that the Abus is cut more easily than the Kryptonite though.

        I’m always a bit suspicious of these tests. Is it the same person doing the cropping? Is it the same pair of bolt cutters? Etc.

        But if we presume that all things are equal in the test, then the Kryptonite certainly looks a safer bet against bolt cutters.

        On the other hand the Abus is double bolted so it’s less likely than the single bolted Kryptonite to be beaten by a leverage attack like this:

        • June 11, 2016 at 10:48 am

          Oh, true, that Abus is silver. My bad. Concerning bolt cutters, the guys from the “House of Chains” youtube channel seem to have always the same tool in each of their movies.

    • June 9, 2016 at 6:15 pm

      In this video (around 6:30 minutes in) the guys from Almax cut through a whole series of bike locks. However, most of them are chains and it’s not clear how thick the u-locks are.

      But it’s widely accepted that it’s only at 16 mm that a chain or shackle is guaranteed to be bolt cutter proof.

      Having said that it won’t be easy to cut through the Pitbull. The thief would need huge 36 or 42″ cutters, would have to to be quite heavy and would need to get the lock in a favorable position where they can use the ground for leverage.

      In fact I would say you were more a risk from a bottle jack attack than bolt cutters with the Pitbull.

      I don’t think Kryptonite steel is any better than OnGuard steel.

      And as to whether your bike will be safe locked up with the Pitbull, it will depend on the value of your bike, what kind of area you’re leaving it in and how long you’re leaving it for.

      It is a very secure lock though.

      • June 11, 2016 at 11:25 am

        You’re certainly right, my bike safety depends also on its value and that is not very high 🙂

        To answer the question “how secure my bike is”, I think of different levels of bike locks as of “filters”, filtering out particular levels of potential thieves. The lowest level are “accidental” thieves. They are not stealing for leaving and hence they don’t have any tools with them, but they see a bike and say “nice bike, I want it”. Those can be “filtered out” even with cable locks, perhaps. The next level are opportunistic thieves, stealing for leaving but still hunting just for low-secured bikes, easy to get without much effort. This kind of thieves would defeat cable locks and low-ranked U-locks but they would be “filtered out” by high-ranked U-locks. Finally, we have professional thieves with angle grinders who would not be “filtered out” by any U-lock.

        So, the sense of the question “Pitbull or Brute” reduces to the question whether there exists a category of thieves somewhere between the opportunistic and professional, who would be filtered out by a Brute U-lock but still would attack a Pitbull. I imagine such a thief as a mentally opportunistic (and hence hunting for any bike), but equipped with better tools, sufficient to defeat a Pitbull U-lock. I would say that existence of such a category of thieves is against the laws of the “market” 🙂 But whether such thieves exist depends probably on the area.

        Now I think I would buy OnGuard Brute STD but it is a little shorter than Pitbull, which means there would be more situations when only “improper” locking technique would be applicable. What do you find a more important when securing your bike: apply the proper locking technique (frame + rear wheel) using a slightly weaker U-lock (Pitbull) or apply “improper” locking technique (say, rear triangle of he frame + wheel pokes) but with stronger U-lock (Brute)?

        Concerning these bottle jack attacks, do you think that the strongest U-locks as OnGuar Brute or Kryptonite New York are immune?

        • June 11, 2016 at 11:28 am

          Oh, and sorry for my orthography. “Stealing for living” was what I meant.

        • June 11, 2016 at 1:18 pm

          Good points Grzegorz!

          I think in this particular case, proper locking technique (which fills the internal space) with the weaker u-lock is better than improper locking technique (leaving space inside the U) with the stronger lock.

          And this is linked to your next question. Bottle jacks can defeat even top of the range u-locks. You can see that in this study where the guys from Almax (again) defeat the New York Standard with a bottle jack.

          But you can easily thwart bottle jacks with a proper locking technique that fills the u-lock leaving them no space. And notice they don’t tackle the bigger u-locks with bolt cutters because it’s much easier with a bottle jack.

          Of course the best option is the stronger lock with the proper locking technique!

          • June 12, 2016 at 3:31 pm

            Wow, I didn’t realize that bottle jack attacks are that dangerous! However, I have found the following video where a Master Lock lock withstands a bottle jack test.
            But I understand that bottle jack should be considered to be a danger even for strong U-locks.

            And thus I think the conclusion is to buy the one of Brute or Pitbull U-locks which allows more possibilities of good locking techniques (with good technique understood as filling the U-lock internal space as much as possible). Do you find it reasonable?

            However, to tell what allows more such possiblities also is not a straightforward question. As I understand, perfectly, using a single U-lock, one should a) use a good technique, e.g. connect the sit tube of the frame, the rear wheel and an immovable object, as a bike rack and b) do it with a possibly short U-lock. So again, it’s up to discussion what’s best, because on one hand a short U-lock obeys the condition b) while on the other, if too short, it reduces chances of fulfilling a) – if too short and there is no bike rack around, it can be hard to apply the mentioned locking technique.

            I have an idea that maybe it is a good thing to buy a short U-lock (as OnGuard Brute) and, if in a given situation it occurs to short to connect the sit tube + rear wheel, apply some sort of “plan B” technique. This plan B technique of course also should attempt to fill free space in the U-lock.

            For example, there is a technique of connecting the rear triangle of the frame and the wheel spokes, as shown e.g. in this movie (about 1:05):
            Do you find this technique safe?

          • June 12, 2016 at 6:39 pm

            Yep I think that’s an OK technique if you can’t get the lock around the seat post and rear wheel Grzegorz.

  • July 3, 2016 at 8:42 am

    I ended up buying the New York Noose chain only, figuring I’d be able to use it with one of my U-locks. Turns out what’s not mentioned here, nor elsewhere, except in passing, is that Kryptonite made the oval links narrower, so only a lock with a relatively narrow U will pass through. I find it asinine because the circular ring is plenty wide enough for larger links. So now while the chain is pretty robust, you’re forced to use a lock with more like 13mm or less (don’t forget the coatings!) to lock it together. This actually reduces locking options in a chain designed to add options.

    As for the Abus Mini 401- I live in Germany and they made it impossible to get these here and they are likely discontinued. Also, unscrupulous retailers are subbing the 140 for the 401 and using the same pics, but it’s Abus fault, ultimately. Not to mention, they also made it impossible to get the Granit 54 Mini and likely that’s also discontinued, so now one can only get it with that ridiculously long U. Abus is just a ridiculous company. Completely out of touch and products are overpriced for the security levels.

    OnGuard, as I’ve previously commented, is somewhat ok, but this site doesn’t mention that the crossbars appear to only be made of plastic in the Brute models, with some mechanism parts out of metals.

    I’ve used a Magnum UL1 for years on my cheaper commuter. Worth every penny and has never given issues-has been outside everyday, rain, snow, since 2008, and never failed. And I got it for like 25 EUR, and they still sell them under the “Magnum Oxford” name for about 40EUR. That was just a chance affair in the bargain bin at my local bike shop at the time. 16mm shackle.

    Kryptonite is ok, but the CS is a bit spotty depending on the country, which I have been able to confirm, to some extent, like in Germany, they don’t really have a German distro, but deal out of Italy, which is ordinarily no issue. They also don’t seem to understand EU consumer laws, such as products purchased in any EU country have valid warranties in another EU country. Though I would trust the company’s products more than Abus, and they present a better value based on price/security than the former, the CS issues are very interesting and rather well-reported- including ordering keys, warranty, insurance, reimbursement for locksmiths when locks are defective, etc. In this case, I’d trust Abus more on the German market, which has 82 million people and Kryptonite doesn’t seem too interested in it, despite the products being better suited than the domestics.

  • July 4, 2016 at 9:19 am

    I would not recommend the Bordo 6000 folding lock at all, because it is vulnerable against bump keys which are sold over the internet. With this method, this lock is opened in seconds, even faster than cutting a cable lock. If you consider a folding lock, stick with the Bordo 6500.

    • July 12, 2016 at 10:26 pm

      Hi Liebig,

      I’ve had a look for bump keys for Abus bike locks and can’t find any online. Can you point me in the right direction?


  • July 6, 2016 at 10:28 pm

    Needing a new lock after last one which I hate to say was a cable lock expired. (combination jammed). This is a really helpful guide and I know what to go for now. Saved me from another expensive mistake. Thank you.

  • July 13, 2016 at 7:21 am

    Any thoughts on the Blackburn U-Locks? The selling points are the Hex shackle, which they claim would require two cuts, and dual bolt lock mechanism. I already have one of these but wonder if it is safe enough.

    • July 13, 2016 at 11:55 am

      Hi Curt,

      I haven’t been super impressed by the build quality of the Blackburn locks I’ve come across. Which specific model are you talking about?

  • July 15, 2016 at 9:41 pm

    Hi I have been reading and re-reading your extremely detailed overview of locks and how to choose one. I really appreciate all of your ideas and research. I just brought a brand new bike to commute to work and all around…and for the amount of money I spent, I want only the best of locks!! When I use my bike to go to work I can bring it inside the only thing is I’m still not sure how to secure it within the building- Any suggestions? So with that said, I was thinking to get the Abus 540 for my back tire and frame and the NewYork standard for the front wheel and frame. Is that a combination that would work well? Or do you have a different suggestion for the front wheel lock? Also as far as people stealing bikes from the home, I’m nervous about leaving my bike in my apartment with nothing to lock it to. In the hall on the first floor there is a rather decorative railing I could lock it up to, but I’m afraid someone could cut the railing to get the bike! Do you think my bike would be most secure in my apartment (unlocked-meaning I can’t drive an anchor into the ground!) or in my basement attached to one of those cement anchors?

    Thanks so much for your thoughts and the clear lay out of how to do this right!

    Take care,

    Dingo Dean

    • July 17, 2016 at 8:04 am

      Hi Dean,

      You’re right to be worried about you bike both at work and at home. People often assume that their bikes are most at risk when locked up on the street. But in fact over 50% of bikes are taken from the owners home.

      It’s difficult to give any advice about your work without knowing the specifics of your workplace. Be wary of dedicated cycling storage areas at work. These often give a false sense of security. So people don’t lock their bikes properly and are careless with the entrances. But they are often easily breached and thieves know they’ll have easy pickings.

      My generic advice would be to keep your bike as far as way as possible from any areas that are accessible or visible to non-work people. How you lock your bike will depend on the facilities.

      In terms of your lock choices, the New York Standard and the Abus 540 are both very secure locks. But that’s a very heavy combination to be carrying around every day. It’s the same as around 8.5 cans of coke!

      I might be more tempted to go with the Abus 540 or the New York Standard as my main lock and then a smaller u-lock like the Kryptonite Messenger Mini to lock the front wheel to the frame.

      This is a less secure combination for sure, but it’s more practical. It really depends on how risky your area and where you’re going to leave your bike and for how long.

      If you’re just using it to commute, then you could buy big thick chain locks to leave at home and/or work. These would compliment the u-lock as they generally require different tools to defeat them.

      In terms of inside your apartment or in your basement, I would say that inside your apartment is definitely more secure. Of the 50% of stolen bikes that are taken from the owners home, the vast majority of those are taken from the owners garden, shed, garage or basement!

      Far fewer bikes are taken from inside the house or apartment. This is a completely different type of crime and most bike thieves are wary of entering an owners actual dwelling.

      By the way, I’m assuming here that when you say your apartment your referring to your own private space rather than communal space? That would be a different matter, since communal spaces are significantly less secure.

      Inside your apartment with nothing suitable to lock your bike to, you could try the bucket of cement method I talk about in the how to lock your bike properly page. This involves filling a bucket with cement and embedding an old u-lock or ground anchor in the cement.

      This will create a pretty heavy anchor you an chain your bike to, which should deter most thieves if it’s in your apartment. It’s not pretty but it should be be pretty effective!

      I hope that’s helpful. If you have more questions, let me know!

      • July 18, 2016 at 5:20 pm

        Hi thanks again for your really thoughtful advice about my bike locking situation.
        With this expensive new shiny bike that I love I’m feeling really anxious about wanting to use it all the time but not being worried it gets stolen! I am for sure going to always lock it up with two locks like you suggested and buy the hex nuts for my quick release thats on the front and back wheels Until I get the right locks I’m not leaving it outside. I don’t mind keeping my bike in my apartment I was just thinking it might be more secure locked to the railing in the front hall, since I can actually lock it to an unmovable object- that railing, I mentioned in my last post. Sounds like having it, even unlocked in my apartment is the safest way to go along with that plaster filled bucket! As far as using my bike beyond my 20 mile round trip commute to school everyday, I would like to use it to go grocery shopping where there are bike lock stations and I can easily lock it twice. Your right that the NewYork lock and the Abus would be a lot of weight. Do you think that kryptonite messenger mini will do the trick for that type of situation, along with the Abus 540 for my back wheel and frame? I guess the bottom line is I don’t want to be afraid to use my bike around town and I want to get the locks that will provide me peace of mind. Thanks again for your thoughts on this it’s been really time consuming figuring this out and your blog and website makes the management of it much easier!



        • July 18, 2016 at 9:38 pm

          It’s difficult to make any definite recommendations without knowing the value of your bike and the how risky is the area you’ll be leaving it Dean. But the Abus 540 is a very secure lock. And the Messenger should be fine for securing your front wheel. Especially if you use secure skewers as well.

  • July 16, 2016 at 9:27 pm

    Good information but you failed to cover one critical issue: picking the lock. Most locks are very easy to pick and so what if you can’t break the lock/chain etc. if you can pick the lock in 5 minutes?

    • July 17, 2016 at 8:09 am

      Hi Tim,

      Thanks for your comments. Lock picking and bumping has been coming up a lot recently. I’ve always thought that very few bikes are stolen by the thieves picking the locks. And similarly that only the cheapest locks can be bumped.

      Can you provide proof that locks can be easily picked in 5 minutes? I can’t find any evidence (for example on YouTube) that that’s the case.

      It should be noted as well that 5 minutes is a fairly long time when you’re stealing a bike!


        • July 18, 2016 at 6:16 am

          Sorry Tim, what I meant to say was “proof that bike locks can easily be picked in 5 minutes”. I know that YouTube is full of people picking locks.

          But there’s not so many people trying to pick bike locks. And I mean good bike locks (Sold Secure Silver and Gold) rather that cheap combination and cable locks.

          I had another dig about myself and I found one person that was picking good Kryptonite locks but he was using some special tool that no-one seemed to recognize. And there was another person picking lower security Abus locks quite quickly.

          And I even found someone picking the Abus GRANIT X-Plus. But it took him a long, long time.

          My point is: there are some people here suggesting that picking and bumping good quality bike locks is both a) easy and b) a common way to steal bikes. And so far I don’t see much evidence that this is the case.

          My feeling is that 99% of bike thieves don’t have the skills or the tools to pick good bike locks. Bumping is perhaps another matter. For example I can imagine a situation where there’s sets of bump keys going round for certain cylinders and that this could rapidly become a significant problem.

          But I can’t find any video evidence of good bike locks being bumped so far.

          I’m not discounting the theory at all. And I’m going to look into it in more detail. But I’m struggling to find any evidence at the moment other than anecdotal accounts of people coming back to bikes that have been stolen where just the lock is left apparently un-tampered with and still fully functioning.

  • July 18, 2016 at 11:10 am

    Thank you for the great article. there was no mention of wheel locks and attached chains which seem practical and not expensive. Are they simply too insecure for their inclusion in your review?

    • July 18, 2016 at 11:12 am

      Thanks Mark. I’m not sure what these locks are. Can you post a link?

        • July 20, 2016 at 11:43 am

          Hi Mark,

          Yes I like frame/wheel locks. In fact my girlfriend has one on her bike. But I think they’re very much a secondary layer of security.

          So I wouldn’t leave my bike secured solely with one of these and one of the associated chains. The connection between the chain and the frame lock is too easily defeated. (And definitely no cables!)

          But as way to protect your back wheel and immobilize your bike they’re great and work well in conjunction with something more robust like a a u-lock. I hope to write a piece on them in the future!


  • July 26, 2016 at 7:31 pm

    Great article,
    Very clear and helpful
    Thanks’ for the work you have put into it

  • August 26, 2016 at 3:53 pm

    I really enjoyed this review of locks. I have to ask what about licks that have built in alarms ? I think that would be the best choice myself.

    • August 28, 2016 at 8:37 pm

      Hi Marcel,

      I think locks with alarms are great in theory. But you need to be careful about using them in the street as all sorts of accidental contact can set them off.

      Thanks, Carl

    • August 29, 2016 at 6:07 am

      Hi John,

      Yes, I wrote a preview of it here, before it was released.

      I haven’t got hold of one to review it properly now it has been released, but there are some good reviews in the comments under my article from people who have. I do hope to be reviewing it soon!


    • November 5, 2016 at 5:37 am

      Hi hows it going? Great info on bike locks what is your opinion on the new ALTOR bike lock best regards Willie

  • October 3, 2016 at 11:09 am

    A friend got her expensive bike stolen while the frame was secured with a Kryptonite Fahgettaboudit to a railing on a busy street in broad daylight, most likely by having its lock picked. A YouT video shows it can be done under 1mn, so even if it takes 3-4x longer, it’s doable.

    I read that Kryptonite don’t make the best locks, but in any case, no U lock at this point seems to have any way to deter lockpicking.

    So my advice would be to either use two, different, lighter but still Bicycle Gold-rated U locks, and as much as possible, simply not leave your expensive bike locked on the street.

    • October 3, 2016 at 11:31 am

      Hi Vincent,

      Can you give us more details about the theft? What makes you think the lock was picked?


  • October 8, 2016 at 11:31 am

    Is the new Liteloc any good? I have seen a lot of good reports but no real tests on this new lock.

    • October 8, 2016 at 3:12 pm

      I haven’t used it myself yet. But I’ve written a preview here. And there quite a few comments underneath from people who have actually used it.

      I’m hoping to review it soon. Also: check back next week for a full review of the TiGr mini and a piece on lightweight bike locks in general!

    • October 19, 2016 at 9:36 pm

      Wow thanks for letting me know about that Maja, I’d not seen it before!

      Like you say, it seems hard to believe. I’d imagine a hacksaw would go through it pretty quickly. We’ll have to see when it’s released.

      It might be a good cafe stop lock for racers?

      There seems to be lots of innovative locks coming out at the moment. And if they genuinely give us more options, that’s definitely a good thing!

  • November 5, 2016 at 8:28 pm

    Hi Carl hows it going? Thank you for great info on bike locks can you please let me know if the ALTOR bike lock is worth the extra money. Best Regards Willie

    • November 6, 2016 at 11:00 am

      Hi Willie,

      The promotional material looks really promising! But this lock hasn’t been tested and verified as “high security” by anyone apart from Altor themselves.

      And I don’t recommend locks that haven’t been rated by a third party expert such as Sold Secure or ART. Especially when it’s a new type of lock like this one.

      If it’s tested and rated Sold Secure Silver / 2 star ART (or above), then sure it may be worth the extra money. But until then I’d be very careful.

      I’m not an expert on metals by any means, so don’t take this as gospel…

      But as far as I understand, while Grade 5 titanium is very strong and light, it’s not very hard when compared to the steel used in other high security bike locks.

      This means it’s more susceptible to cutting attacks from hacksaws and bolt cutters. And I can’t see how a hollow (11 or 12 mm?) titanium tube would be so resistant to 42″ bolt cutters.

      I really hope that Altor get their lock tested and that I’m proved completely wrong here. Because I love to see innovation and I love to see these sort of startups do well.

      So I would urge all these new lock companies to get their locks tested and rated as it’s the only way we’ll really know how strong their locks are.


      So, just be to clear about this: no I don’t think it’s worth the extra money until the lock has been tested and rated as Sold Secure Silver / 2 star ART (or above)!

  • November 13, 2016 at 5:07 am

    Firstly, thank you SO MUCH. this site was EXTREMELY helpful.
    I have a leader 725 track bike which i got as a gift, so I’m no willing to pay over $50 for a lock. I don’t plan on ever leaving it in public (in a fairly dangerous part of Los Angeles) for over 20-30 minutes. Based on this site, i determined my best option is ONGUARD Brute STD, to lock the front wheel and body (because i couldn’t even take off my back wheel in about half an hour).
    Is this a good idea, and do you recommend anything else (a different lock, buying 2 locks etc.)?
    also, about how much is my bike worth?
    Thank you so much!!!
    Sruly Srugo

    • November 13, 2016 at 10:52 am

      Hi Sruly,

      What a fantastic gift! It seems like it’s around $800 brand new, so it’s definitely a desirable bike that’s going to attract second looks.

      If you’re on a tight budget then I think you’ve made the right choice with the OnGuard Brute STD. It’s the best value high security U-lock currently available.

      So, you should be able to protect your frame and your front wheel with the Brute. And if, as you say the back wheel is very difficult to get off and you won’t be leaving it very long then you that will probably be enough.

      Make sure you take some steps to secure the seat. And any other components that are valuable and easily removed. Definitely get rid of any quick release bolts.

      It goes without saying that a second lock will improve your security. But it will also increase the weight you’re carrying around. And the Brute is already very heavy.

      The TiGr mini would make a great, lightweight secondary lock. But it’s expensive and you’ve said you’re on a tight budget.

      A cheaper alternative might be the Kryptonite Evolution LITE Mini-6.

      But if you won’t be leaving your bike unattended for very long, the Brute may well be enough. Just make sure you take measures to protect it while it’s at home too.

      Good luck and I hope you enjoy the Leader!

  • November 27, 2016 at 11:38 pm

    Hi Carl! Thanks for the great article and extensive information on all the great lock options out there. I’m trying to decide between the Abus granit plus 540 and Abus bordo 6500 based on weight and security. I like the fact that the bordo is more compact and easier to stow away while riding. But I still decide for sure if I should get that over the 540. Any advice or recommendations? Thanks!

    • November 28, 2016 at 12:32 pm

      Hi Anna,

      The Granit Plus 540 is both lighter and more secure than the Bordo 6500. It will also generally be quicker and easier to lock your bike with the 540.

      However, as you say, the Bordo 6500 is much more compact and will fasten to your frame more neatly. If this is really important go for the Bordo. Otherwise I’d recommend the 540.

      The frame mount that comes with the 540 is actually pretty good, so you shouldn’t have the loosening and rattling problems you might get with other u-locks. And if you can put up with the more invasive nature of the u-lock it will probably the better choice.

      They’re both great locks though, so I’m sure you’ll be happy whichever one you choose!

      I hope that helps,


  • January 6, 2017 at 12:43 am

    Hi –

    What are your thoughts on the Onguard Bulldog Combination STD U-lock? I like the idea of not having to lug a key around (and potentially lose it). Perfect for beach outings, Onguard seems to be the only one with a combo lock.

    Another advantage is if I ride somewhere with a friend and we want to leave at different times, they can get their bike out, lock mine back up, and again…. no swapping keys needed.

    Thoughts on this lock from a security standpoint???



    • January 7, 2017 at 6:21 pm

      Hi Briola,

      Combination locks are generally less secure than keyed versions of the same lock.

      This is because they’re vulnerable to picking. Check out YouTube for plenty of videos!

      However, in this case the sliding button that’s used to release the lock once you’ve entered the right combination should negate the usual vulnerabilities.

      And OnGuard give the combination lock the same security rating as the keyed version here.

      So you should be OK. Just be aware that whether combination or keyed, the Bulldog locks are mid-security bike locks. They’re not suitable for high risk situations.

      I hope that helps!


  • January 9, 2017 at 6:43 pm

    Hello, very useful & informative article, thank you.
    Would appreciate your input on a secondary lock – I live in a city so high-risk area and would leave bike parked for the whole working day.
    I already have a perfectly fine Abus 51/150 (Sold Secure Silver i believe) so would rather not replace that for the sake of wasting it. Would like a Gold secure lock that is not overly heavy, with enough length to secure the saddle as well.
    Any suggestions would be much appreciated.

    • January 9, 2017 at 9:25 pm

      Hi Natalie,

      I’m not sure what you mean by “enough length to secure the saddle”. Do you mean you want a lock that will go around the frame and through the saddle rails, without removing the seat post from the the seat tube?

      If so, I’m not sure that would be possible. I can’t think how you’d do that with a U-lock. So you’d be looking at a chain lock. And not only are Sold Secure Gold chains heavy, they’re also very thick. So they might not fit through the saddle rails anyway.

      Although I suppose it will depend on how your bike’s set up. Maybe your seat is very close to the top tube and has a lot of space between the rails? Would you be able to post a photo?

      To be honest, my advice would be to treat the saddle and the frame separately. So, get a special lock for the saddle, like the ones I review here. Or use one of the DIY methods I describe on the same page.

      And then get a Sold Secure Gold U-lock for the frame. If you want a standard sized U-lock the MasterLock 8195D is very light or of course there is the Abus GRANIT X Plus 540 230 which is just a little heavier, but more secure.

      But since you wouldn’t need to secure the saddle, maybe a mini U-lock would be enough. In which case the OnGuard Pitbull Mini is fantastic value for money, or the Abus Granit X-Plus 54 Mini (which is a smaller version of the GRANIT X Plus 540 230).

      You’re right to be concerned about the weight. You’ve already got a reasonably heavy U-lock. Add another Sold Secure Gold U-lock (even a mini) and you’re carrying a fair bit of weight.

      So if you can manage with a mini and a separate saddle lock that might be the best option.

      Hope that helps!


  • January 24, 2017 at 7:45 pm

    You can currently get a Pitbull STD with the Cable for about $8 more than the Kryptonite Kryptolok Series 2. Given how close that is, would you update your Best Budget pick? I am looking for a lock for a new bike and I think I am going with the PitBull.

    • January 24, 2017 at 9:27 pm

      Hi Sean,

      That’s a good question! I actually think the way I’ve classified them is wrong. I shouldn’t be talking about “the best budget lock”. If anything it should be “the best budget mid security lock”.

      So anyway, I’m about to completely re-write the U-lock classification, so that it’s about security rather than budget.

      But beyond all that the Pitbull is a great lock and a fantastic choice at that price. I’ll be reviewing more OnGuard U-locks shortly.


  • January 31, 2017 at 5:52 pm

    Hello Carl,

    I need a sold secure gold lock that will fit into a 15 litre hydration pack (12 litres of space due to 3 litre reservoir) for all sorts of riding (both commute and MTB). Anything heavy would be a no.

    I don’t know exactly what weight would compromise the ride, but I have discussed it with a few veterans of MTBing online, that it has to be folding lock and light (1 Kg or less).

    If there is no super light folding lock, then if there is a U-lock that will fit into my pack and is light enough, then I will get one of those, instead. If it helps, my pack is a Shimano Unzen. Maybe I am asking for too much: maybe I should get more than one lock.

    I just want to have no problems with insurers in the future, without compromising my ride on trails, XC and Enduro.

    • January 31, 2017 at 9:12 pm

      Hi Ross,

      The lightest Sold Secure Gold lock that will fit in your pack is probably the Abus U-mini 401 Yellow, which weighs 1060g.

      However, it’s pretty difficult to get hold of (I suspect Abus have stopped making it). It’s also a mini U-lock (and at 5.71″ x 3.15″ it is really small) which will limit your locking options.

      The only Sold Secure Gold folding lock is the Abus Bordo 6500 which is a fair bit heavier at 1580g.

      Could it be that there is less risk when you’re riding trails, XC and Enduro? If so, then maybe you could get a less secure lock for those times and another more secure lock for when you’re commuting?


  • February 8, 2017 at 8:45 am

    My 10 year old son’s mountain bike was stolen within 10 minutes when locked up with a Kryptonite Kryptolok Series 2 . The thief simply snapped it with a crowbar – didn’t even use bolt cutters!! I was horrified to see what the metal U bar was composed of. Looked like cast iron with a coating. Was not hardened steel. How this got a silver rating is beyond me + to call a brilliant budget lock is simply wrong! It must cost Kryptonite a fraction of the purchase price to manufacture. Admittedly they offer insurance but the bike was stolen so quickly I did not have time to register. If you do purchase this lockso ask to register before leaving the Store!! Terrible value for money and a horrible experience! It is beyond me why they cant develop a decent lock! (which doesn’t weight more than the bike!!)

    • February 8, 2017 at 1:08 pm

      Hi Harvey,

      I’m really sorry to hear about your sons bike being stolen. It always seems worse when it’s a kids bike.

      Unfortunately, these sort of leverage attacks are one of the most common way to defeat U-locks. And even Gold rated U-locks can be beaten if the thief has a long enough pole and can get enough leverage.

      You’re certainly right, the steel of the Kryptolok isn’t the same quality as some of the more expensive Kryptonite locks. But I still think it’s a great lock. I’ve left my bike protected with this lock day and night, without incident.

      One of the things you can try nest time (apart from getting a better lock!) is to fill as much of the space inside the lock with the bike and the immovable object. If a thief can’t fit a crowbar or pole into the space, they wont be able to get the leverage to break it.


  • February 10, 2017 at 12:58 pm

    Wonderful article, good research, very straightforwarding information! Thank you very much!

  • March 18, 2017 at 11:50 am

    Hi, very helpful your site!
    I’ve a question, what about a U lock with combination?
    (This is an example: Onguard Bulldog STD-8010C).
    Is it better or not in comparison with the Key lock?
    Thank a lot from Italy.

    • March 18, 2017 at 1:44 pm

      Hi Paolo,

      A combination locks will usually be less secure than the same lock that uses a key. This is because the combinations are often quite easily to work out.


    • March 28, 2017 at 11:37 am

      Hi Doug,

      Yes I do rate it, as a folding lock. But folding locks are always less secure than comparable U-locks.

      Perhaps I don’t make this clear enough on this page. In the individual reviews of the 6000 and 6500 I think I explain that they are both at the lower end of their respective Sold Secure security ratings.

      For example the 6500 only gets 2 stars from ART, which is the same as the Sold Secure Silver Kryptonite Kryptolok.

      And as the bikeradar review says, this is because the rivets that hold the links together are vulnerable.

      As for their 18 seconds claim, it’s difficult to judge. Were they attacking the lock in a vice or around a bike? Was it on the floor or elevated?

      The Bordo 6500 is the most secure folding lock available today. And in most situations it will give you enough protection. But it’s not very secure for a Gold rated lock.

      So, think about your risk level using the table at the top of the page. If you’re resoundingly “High Risk” for all three questions then maybe the 6500 isn’t secure enough for your circumstances.

      If that’s the case then think about what exactly’s the convenience of a folding lock for you. More locking opportunities? Easier to carry?

      Can you replicate that convenience with a different combination of locks?

      I hope that helps

      And I will edit the homepage to make it more clear that folding locks are inherently more vulnerable to attack than comparable U-locks!


      • March 28, 2017 at 2:49 pm


        Thanks for the quick reply. Picking up a new Electra Balloon 7i Townie today and trying to find the best lock to fit around the large frame and balloon tires, which is what drew me to the folding lock originally.
        As a long time whitewater kayaker I had always relied on cable locks to lock up my kayaks and thought they were secure. So all this research into more secure options is new to me.

        Thanks for your research and replies!


        • March 29, 2017 at 5:31 am

          OK I can see why you might want a folding lock. Although bear in mind that the standard sized 6500 doesn’t give you any more internal locking space than a Standard sized Kryptonite Kryptolok.

          Have you though about separate wheel security so that you don’t have to worry about your main lock securing your frame and your wheels?

  • March 31, 2017 at 8:59 pm

    can you comment on “freezing sprays?”

  • April 16, 2017 at 6:19 pm

    My wife and I have just moved to Malaga Spain from Hong Kong. Retired in our early 60’s. Bought two Torrot electric folding bikes since my wife remembers them from her childhood, to wander around town (lots of hills that are a breeze with the boost). They will also go on our new boat for transportation ashore around the Med. My first post-purchase were two Bordo 6000 locks. Let’s hope that with some common sense, the Abus locks will allow us to keep the bikes. BTW, from what I hear from my sister-in-law who lives in Barcelona (she carries her Brompton) I wouldn’t leave a childs Big Wheel on the street. 12 hours and it’s gone.
    If you have any suggestions specific to E-bikes we would really appreciate the input.
    Excellent website!

    • April 16, 2017 at 8:47 pm

      Hi Ken,

      Congratulations on your retirement! I suspect the Bordos will be fine. Even in Barcelona, although (as you say) the thieving is relentless, the thieves themselves aren’t too advanced.

      I leave my bike out overnight all the time, often locked solely with a Kryptolok. And I never have any problems. On the other hand, I know if I leave it locked anywhere with a cable lock it will be gone in a couple of hours!

      I’m actually planning an article on electric bikes soon. I think the general gist will be spend a little bit more on a decent lock as electric bikes are more expensive, and don’t worry so much about the weight as the motor will compensate.

      I’d imagine with your folding bikes they will be spending very little time locked in the street anyway!


  • April 17, 2017 at 2:49 am

    How would you lock 3 bikes in the back of a pickup? They stand in a wooden rack. I’ve always used a cable and padlocks to the trucks tiedown points. Thanks

    • April 17, 2017 at 9:23 am

      Hi Dave,

      Could you not use chains? They’d be much more secure than cables.


    • September 13, 2017 at 6:31 pm

      Use 2 long shackle u locks to lock 3 bikes together.

  • May 17, 2017 at 8:50 pm

    Today I almost had my bike stolen off the bus they would not let me lock it on the bus rack but I pit the chain between my tire in my seat for that I was able to get by bike back from the thief Got a little hurt the process but I still got my $744 bike I Have had to stolen previously If you ride a bus like I did you have your bike walk to the rack if they let you if not lock it to your tire to your seat and keep an eye on your bike So hopefully it doesn’t get stolen

  • May 21, 2017 at 8:33 pm

    Very good article. One thing I would add is that many bikes for everyday use unnecessarily come with quick release wheels and these always need to be secured as well probably with a long secondary cable lock.

    • May 22, 2017 at 11:24 am

      Hi Wesley,

      Yes I agree quick release wheels are a nuisance. I cover this in some depth on the Wheel and Seats page.

      I’m more and more in favor of separate wheel security these days, whether simple hex skewers for cheap wheels or properly secure skewers for more expensive wheels.

      Then you can have a much smaller lock just for the frame.


    • May 26, 2017 at 11:49 am

      As far as I know the seatylock itself isn’t yet rated by Sold Secure. It’s the straight forward folding locks that are Silver rated.

      I know, I know: I need to update my website, I thought that the Abus folding locks were the only ones rated by Sold Secure!

  • June 3, 2017 at 10:12 am

    Thanks a lot for this post, it was really helpful! I was thinking to get a foldable lock, but you’ve changed my mind and ended up going for the abus u lock, the good good one 😉
    Have an electric bike and even if not planning to leave it on the street for long preods of times I wanna be sure that once I have to it will have the best possible lock.
    You have been very thorough and clear, thanks again!!

  • September 7, 2017 at 1:32 am


    Your article and analysis was excellent and so very helpful. Thank you very much. I’m considering the Abus 540 without the bracket. Thanks again.

  • September 13, 2017 at 6:28 pm

    Hi can you review some tonyon locks? Apparently they are approved by ART.

  • September 15, 2017 at 9:04 am

    since portable angle grinders came there are no secure locks. period.

    looking through internet and youtube for a few minutes it is depressing and obvous that even the strongest 16mm premium locks are forced within a minute or two. many so called high quality locks are pickable with the right gadgets, so you neednt even bother with the grinder.

    a special warning for the glue method; they will put glue in your cylinder, you will have to leave your bike outside work, the next day its gone.

    you should of course use a decent lock and secure to a post if you ever leave your bike in a street. but as i see it there are two better tactics you can employ. one is using a bike thieves will not want, i e are not able to sell on. for example adults’ standard bikes with 26 inch wheels are at present absolutely ice cold on the market. you can even leave them unlocked near a train station, they will not go away.

    the other is using a bike you can always bring inside, and with a cover on even into the pub or cinema. a prime reason to get a foldable bike, for example a brompton.

  • September 15, 2017 at 8:49 pm

    My branch at NASA has at over 45 non-expensive bikes we use for our engineering interns throughout the year. While the interns are working for us, most from out of state with no vehicle, we outfit the interns with bikes with front and rear lights, book-racks, & helmets, bringing the total bike expense to around $500. All have cable locks.
    After reading your article I am not buying cable locks for our interns bikes even though the housing and work place for our interns are fairly secured – its when the interns travel outside the NASA campus to downtown locations (for food and entertainment) that the bike could be (and has been) stolen.

  • September 26, 2017 at 2:13 pm

    Thank you for the nice article!
    What do you think about code locks?

    • September 26, 2017 at 2:38 pm

      Hi Alexander

      They’re not generally as secure as keyed locks, so I don’t tend to recommend them. Cable and chain locks with codes are notoriously easy to de-code.

      U-locks with codes may be more secure. But in general, i’d steer clear.


  • November 7, 2017 at 12:25 pm

    I posted about a year ago wondering why you don’t like “armored” cable locks such as the on guard rottweiler series. The 8023L model is 30mm thick with hardened steel plating and 7 feet long. And far more heavy duty than some of the low end 8-9mm short chains you post, while providing more lock up options. I find it really funny that a weak lock that is “litelock” is sold secure gold. (this tells us how meaningless and vague some of these sold secure and ART ratings can be, That lock is terrible. It’s literally 4-5 tiny cables. Same thing with the TIGR, another terrible overpriced lock. Countless videos of them being destroyed in seconds. But you suggest them on the main page. People just like what is new, for the sake of it. Furthermore U locks and chains are great, but so many times they are not even usable. Or you have to combine them with other locks to secure the whole bike. Most people end up getting lazy and not doing so. I think the on guard 8023L at 30mm and 7 feet has its place. There is no way that the litelock or TIGR is more secure, especially since u can’t come close to getting both wheels and the frame at once.

    • November 11, 2017 at 7:11 pm

      Hi Brad,

      While the testing processes of Sold Secure and ART may not be perfect, they’re the best means of comparing a wide selection of locks that we have at the moment.

      And the bottom line is that the OnGuard Rottweiler armored cable locks have a Bronze rating from Sold Secure and that is below what I consider acceptable for recommendation.

      Have you considered that it may be the locking mechanism rather than the actual cable that’s the issue with the Rottweiler (much like the OnGuard 8020 Mastiff)?

      By the way, there are zero videos of the TiGr Mini being destroyed. And while there is one video of the Litelok being beaten I was unable to replicate it when I tried and no other accounts of such easy defeat have come to light since.

      The idea of this page is not to tell you which are the strongest locks. I have a strongest lock page for that.

      The idea of this page is to give you an easy step by step process to find the best bike lock for your individual needs. If the TiGr Mini or the Litelok don’t suit you that’s fine. They definitely won’t be the right choice for many people. But for some people they will!



  • November 15, 2017 at 2:12 am

    There is a very well known YouTube video of a small German woman using bolt cutters for the first time in her life cutting the tigr lock in seconds. And Wayne the locksmith on YouTube cut the litlok in like 7 seconds. I think you need to do a little more research. I don’t know how someone can have a website with lock reviews and ZERO real word tests posted or cutting attempts. You backing litlok and tigr shows how little you know about locks. Both those locks are hipster locks that people like and fall for because they are new looking.

    • November 15, 2017 at 6:43 pm

      Brad, if you read my review of the TiGr Mini you’ll see that I actually link to the German video. It’s a different lock. The TiGr Mini was developed later was made wider in response to that video.

      The whole point of this website is that Sold Secure and ART have already done the real world tests, so we don’t have to. But of course if you think that they’re corrupt organisations, that’s no good to you.

  • November 15, 2017 at 4:32 am

    You saying you can’t destroy litlok is meaningless without a video. Were you using a swiss army knife to try and defeat it….Wayne the locksmith did it in 7 seconds with an angle grinder on youtube. This proves that sold secure and ART are 100% meaningless. There are U locks that last longer vs an angle grinder with silver and bronze ratings. And the tigr is bolt cropped in 3 seconds. Again there are U locks that take far longer to bolt crop with silver and bronze ratings. Have you considered that maybe sold secure and ART aren’t as independent and honest as you think? litlok and tigr are both companies who are literally 1 bike lock. Everything depends on their sold secure rating because most people like you buy into too much. Real world tests by random people on youtube not being paid are the most honest reviews we can get. Not sold secure, ART, or some litlok promotional youtube video (that they took down in embarrassment) making it seem like an angle grinder can’t cut it lol…..

    • November 15, 2017 at 7:47 pm

      Again, if you read my review of the Litelok, you’ll see I posted a video.

      Angle grinder tests are pointless since angle grinders go through all locks in next to no time…

      For sure there are Silver and maybe Bronze rated locks that will last longer against an angle grinder. But they will be less resistant to other forms of attack. And bear in mind even the the Fahgettaboudit only lasts 70 seconds against an angle grinder.

      I totally agree that the promotional videos for locks that suggest that they can’t be defeated by angle grinders are ridiculous. And I agree that the testing methods of Sold Secure and ART could be much better. And it goes without saying that there are much more secure locks available than both the TiGr Mini and the Litelok.

      However I don’t think Sold Secure and ART are dishonest. And I agree with them, that both the Litelok and the TiGr are more secure than a Bronze rated armored cable lock!

  • November 15, 2017 at 11:29 pm

    I do think angle grinder tests matter, that’s why people do them. There is a difference between litlok being cut in 7 seconds with a grinder, and a New York Kryptonite lock taking several minutes in the real world (not in some workshop in a vise). It can mean the difference of having your bike stolen. There are several reviews on amazon of the Onguard Brute and similar ~16mm double sided U locks saving peoples bikes because the thieves grinders ran out of battery (not all thieves have top of the line grinders with full batteries) or authorities noticed the thief and the bike was saved. 7 seconds and several minutes is a big difference

  • December 8, 2017 at 9:45 pm

    Hi, first of all thanks so much for all the information regarding bike security.
    I come to this site frequently when searching what to buy for my bike.

    I just bought an Electrobike $2k rear motor hub ebike and I’m looking for a decent locking method for it.
    So far I’m considering:
    – 1 New York Kryptonite Standard U-lock (for rear wheel and frame)
    – Allen Security seatpost clamp (Pin-in-Hex Socket Head Cap Bolts, so you need hollow allen keys)
    – Allen Security seat clamp bolt (for the seat itself)
    – Non-standard head bike skewer (to replace quick-release in front wheel)
    – 5/8-inch thick flex loop cable (to secure seat and front wheel to U-lock)

    What do you think about the combo?
    I’m also thinking about allen security bolts for the topeak rack but that would be for later.
    My city is not that unsafe regarding bike thefts but the bike does attract seconds looks.
    And I’m also considering insurance from the vendor.

    There are some other tips I’m considering that I don’t see mentioned here in the site like:
    – Movement detection bike alarm
    – GPS Tracking “stickers” on the bike as deterrent
    – An actual hidden GPS tracker

    What are your comments regarding these last extra options?
    I would be leaving by bike in a campus where the bike parking is a few steps away from a security guard entry, so I think an alarm would definitely help.
    Also a GPS sticker might make a thief think twice about attempting to steal it.


    • December 9, 2017 at 11:24 am

      Hi Luis,

      The New York Kryptonite Standard U-lock is a very secure lock so that gets a big thumbs up.

      I’m not sure about how the Allen Key security options you talk about would work. Does that mean anyone with a hollow Allen Key can unfasten your stuff?

      Have you looked at Hexlox as an alternative? I’m a huge fan of these. You could secure your seatpost, seat and front wheel (plus any other components you choose). And you’d only need 1 tiny key.

      The Hexlox would enable you to do away with the cable as well, which only really provides psychological protection and can be a bit of a pain to use.

      A movement detection system is a great idea for wherever you leave your bike overnight. GPS stickers are a good idea too.

      Actual GPS trackers are slightly more complicated. I’ll shortly be reviewing the Boomerang which seems to be the best of the bunch by far.

      You’ll need a SIM card and contract to go with it. And you’ll need to charge it up every week or so. But you need to charge the e bike anyway so that shouldn’t be a big deal. In fact I think GPS trackers work particularly well with e bikes for this very reason.

      I hope that helps!



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