The Best Chain Lock (and how to use it!)

Chain locks are made up of a series of hardened steel links (usually inside a protective nylon sleeve), and a lock. The lock can be integrated into the chain, or it can be a separate padlock.

There are several great things about chain locks:

Firstly, their relative length and flexibility means you can secure your bike to a wide range of objects.

Secondly, for those that don't like those annoying u-lock frame mounts, the shorter, thinner chain locks can be carried relatively easily, wrapped around your seat post.

And finally, they are more resistant to some of the common methods of attack used on other bike locks. For example, they can't be bottled jacked or leveraged open. And they're more difficult to cut with power tools. 

However, these advantages come at a significant cost: they are very heavy. Chain locks are far, far heavier than u-locks, offering equivalent levels of security.

Because of this, we need to divide chain locks into two groups:

1. chain locks that are light enough to carry around everyday on your bicycle
2. chain locks that are so heavy you need to leave them permanently in one place.

So before you buy a chain lock, you should decide what you're really after: portable or stationary security? And once that's established, we can find the best chain lock for you.

Don't worry, we'll cover it all here...

Let's start with the qualities that are common to both groups and the things we should be looking out for when buying a chain lock.

The Chain

Not all chains are made from the same type of metal. For reliable security, the links of the chain should be made from a high quality, core hardened steel alloy, that's not too brittle.

The easiest way to guarantee this is to buy from a reputable brand such as Kryptonite, OnGuard, Abus or Pragmasis.

Chain links usually have rounded edges. However, some security chains now have hexagonal or square links.

These are supposed to be more difficult for bolt cutters to grip, and spread the cropping pressure over a larger surface. So they're supposed to be harder to crop...

However, used bolt cutters will have nicks in the blades which can catch the edges of such links, actually making it easier to get a good grip. So in fact, these different shaped links offer no more protection than round links. Indeed, they may be easier to crop!

But obviously the thicker the links, the tougher the chain lock...

Links with diameters less than 10 mm can be cut relatively easily with medium-sized bolt cutters, if the thief can get the chain in a good position.

Links with diameters of between 10 and 12 mm can sometimes be cut by medium size bolt cutters if the thief knows what they are doing and can get good leverage on the chain.

Whereas, links with diameters between 13 and 15 mm can only be cut by the very biggest 42" bolt cutters, which the vast majority of bike thieves won't have.

And at 16 mm and above, the links can’t be cut, by even the biggest hand operated bolt cutters.

But whatever its thickness, the chance of your chain being cropped can be significantly reduced by keeping the chain as far off the ground as possible when you lock your bike.

In order to crop a decent chain, the thief will need to use one arm of the bolt cutter against the ground as leverage. The further your lock is off the ground, the more difficult and less effective this will be.

The Lock

Any bike lock is only as strong as its weakest point. So there’s no point having a super thick, super strong chain if you’re securing it with a cheap, feeble padlock!

Chain locks usually come with their own locking mechanisms. Sometimes they're padlocks or mini u-locks. Sometimes they're permanently integrated into one end of the chain.

Either way, the locking mechanism should be reliable and should resist leverage attacks, picking, pulling and drilling.

If there’s a shackle, it should be as thick as (or thicker than) the chain links, or inaccessible to bolt cutters (shrouded).

Chain locks: Length vs Weight

One of the advantages of chain locks (over u-locks) is that their (generally) greater length gives you a wider range of objects to secure your bike to.

However, the longer the lock, the greater the overall weight. And chain locks get very heavy, very quickly. Even the lighter chains are often too heavy to carry comfortably in a bag on your back.

Yes, maybe you can attach them to your luggage rack, carry them in your basket or wrap them around your seat post. But, in order to minimize the extra weight, you should generally choose the shortest length that enables you to lock your bike where and how you want to.

Be careful though, some of the short ones are really short! Before you commit to buying a chain lock, measure out a length of rope and test that it's long enough to use wherever you normally lock your bike.

Having said all this, you will just have to accept that a chain lock is always going to be heavier than a u-lock that provides equivalent protection...

For example, the Kryptonite Kryptolock Series 2 u-lock weighs 2.85 lb (1.29 Kg). At the same security level, the lightest Kryptolock Series 2 chain lock is 3.90 lbs (1.77 Kg), nearly a whole pound and 30% heavier.

And at just 21.5” (55 cm) in length, it provides the same internal locking space as the u-lock. Yes, its flexibility is an advantage, but it’s hardly going to give you loads more options when looking for places to lock your bike.

A more practical 37.5” (95 cm) Krytolock Series 2 chain lock is available, but at 5.55 lbs (2.52 Kg) it weighs almost twice as much as the u-lock.

Chain locks are heavy! If that's a problem, get a u-lock or a folding lock instead.

How to choose the best chain lock for you!

I imagine that you already know whether you want a mobile or stationary lock. It's a pretty clear distinction...

You'll use a mobile chain lock every day, carrying it around on your bike and securing it around your bike and the various street furniture in your neighborhood.

Whereas, a stationary chain lock will be left at home (or wherever you leave your bike overnight) and only used there to secure your bike (or more likely several bikes) over longer periods of time.

But what if you want both? Do you want a chain lock that you can carry around every day and use at home overnight? Well, there are locks that can do both. But they don't do either really well.

A two lock system (where you have one for daily use in the street and another that you keep at home for overnight protection) is usually the most secure and practical option.

But don't worry, we'll cover them all...

Choosing a portable chain lock

How secure should your chain lock be?

The best way to discover the security level of any bike lock, is to check the ratings from the independent testing house, Sold Secure.

If you want to know more about Sold Secure and why they provide the best measure of bike lock security, check out my guide to choosing the best bike lock.

All you need to know here is that Sold Secure test and measure bike locks according to their security level, rating each one Bronze (least secure), Silver, Gold or Diamond (most secure).

But how can you know which Sold Secure rating you need? Well, the best way to find out, is to answer the 3 quick questions in the quiz below…

Based on your answers to the three questions, the quiz should recommend either Silver, Gold or Diamond rated bike locks. Bronze locks aren't secure enough for any circumstances, so I don't recommend them at all!

There's quite a bit of variation in security within each rating. So some Silver rated locks are more secure than other Silver rated locks. And likewise for Gold and Diamond rated locks.

With chain locks, this will largely be determined by the link thickness. By choosing a thicker Silver (or Gold, or Diamond) chain link, you'll generally be choosing a more secure one.

How long should your chain lock be?

One reason to choose a chain lock (over a u-lock) is the extra options it gives you when you're looking for somewhere to lock your bike. More flexible and longer chain locks go places u-locks can't.

And the longer the chain lock, the more options you'll have. But longer chains are very heavy (as well as expensive).

So get the shortest length that you need to secure your bike. You can use a length of rope to work that out if necessary.

How should you secure your bike with a portable chain?

I recommend that you don't use a chain lock to secure your frame and your wheels in the same way you might normally use a u-lock:

Chains are much more vulnerable to bolt cutters than u-locks, and if they're too close to the ground (like in the photo above) a thief can use the ground for leverage and cut through the chain.

If you only use it to secure your frame (tightly wrapped around your top tube), you can keep the chain shorter (and lighter). And even more significantly: it will be further from the ground, so it will be much harder for a thief to crop it.

There are plenty of other ways to secure your wheels! And I've written lot's more about how to lock your bike properly.

However, you have a couple of options if you want to protect your frame and your rear wheel at the same time:

With a longer chain, you might be able to get it around your top tube and through your wheel too (as in the photo below).

Or you might be able to fasten it through your seat stays and your rear wheel, in a way that also keeps it a good distance from the ground (as in the photo below).

How will you carry your chain lock around?

Thinner, shorter chains locks can be carried wrapped around your seat post. Some brands sell chain bags that you strap to your frame. And there are even some chain locks that you can wear around your waist.

Make sure you've thought about this before you buy one. Is there room on your seat post? If not, is there room in your bag or your panniers? There are other places to put your lock when you're riding, but chains can be more challenging than other bike locks.

6 mm chain locks

I wouldn't usually recommend 6 mm chain locks under any circumstances. They can be cropped or cut far too easily.

And I've never seen a 6 mm chain lock with more than a Sold Secure Bronze rating, which is just not good enough to protect our bikes!

However, there is one very unusual exception. The tex-lock is a 6 mm chain, encased in a thick textile cover, which makes it look and feel more like a length of rope than a chain lock!

The textile cover provides an additional layer of protection for the chain and if you pair it with their Sold Secure Gold rated X-lock, you get a very versatile bike lock...

In high risk circumstances, you can use the X-lock to secure your frame and the chain to protect your wheels. In low risk circumstances, you can use the chain to secure the frame, (and the X-lock to protect one wheel), with the extra length giving you loads of locking options!

But be careful...

You need to understand the different security levels of the different parts of this chain lock (and how to use them properly), to get the best out of it. The textile covered chain is not rated by Sold Secure and is only suitable for short stops in low risk circumstances.

And the X-lock is very, very narrow, so will only fit around Sheffield bike stand sized immovable objects. 

Check out my full tex-lock review here and read how the X-lock made my best lightweight bike lock list before you buy.

Update: Get 10% off any purchase of Tex-lock products by using the code "bestbikelock10".

7 mm chain locks

7 mm chain locks are at the lowest end of what's an acceptable level of protection for your bike. And the only 7mm chain that currently has a Sold Secure Silver rating is the Seatylock Viking Silver.

Click on the links in the table to check the prices at Amazon (or other retailers).

* In all the tables on this page, I also give the weight in cans of Coke to help you understand just how heavy the chain locks are. On mobile, you just need to click on the small plus sign above the image to see these (plus the security ratings).

If your circumstances are low risk, then you might be able to get away with a 7 mm chain lock. Just don't leave your bike unattended for long periods, and be careful with your locking technique.

I strongly advise that you don't use a 7mm chain lock in the same way you’d normally use a u-lock. This will leave it too near the ground, where thieves can leverage a pair of bolt croppers to cut it relatively easily.

Instead, wrap the chain lock tightly around your top tube and whatever you're locking the bike to. This will keep the lock away from the ground and make it impossible for a thief to move it closer.

I think 7 mm chain locks could still be cropped without using the ground, if the thief has big enough bolt cutters and enough strength. But most bike thieves won't!

What about your wheels? With one of the longer Vikings, you might be able to get your chain around the top tube and the rear wheel. Or you may be able to wrap it around the seat stays and the rear wheel in a way that keeps it far from the ground.

But, if you're using a 7 mm chain lock, I'd imagine that neither your bike nor your wheels are particularly expensive or covetable!

So you might be able to get away with simply swapping out the quick release levers on your wheels for standard bolts. Otherwise, there are plenty of alternative ways to protect your wheels, that won't put the whole bike at risk.

8 mm chain locks

They are only 1 mm thicker than the 7 mm chains and although this makes them a fair bit more secure, they still only get a Silver rating from Sold Secure…

Click on the links in the table to check the prices at Amazon (or other retailers).

My favorite is the Hiplok Original [Amazon] chain lock, It's got the best weight to length ratio, which means it's much lighter than similarly sized, (or even smaller) chains.

Plus, it comes with an integrated Velcro strap, which allows it to be worn around your waist like a belt!

This is a really convenient way to carry your chain lock around. It's quick and easy to get it on. And the way the weight is distributed means you'll barely notice it's there.

I’m less keen on the Hiplok Homie though. This lock is specifically designed for stationary, home use, and to be honest I think we need better protection at home than any 8 mm chain lock can provide.

It's also worth noting that the weight of these locks is becoming significant. The lightest chain locks in the table above, are the same weight as 4.5 cans of Coke, and already heavier than many Sold Secure Gold rated standard size u-locks!

Again, with 8 mm chains, I recommend that you secure your bike by wrapping the lock tightly around your top tube or the seat stays, so it can't be maneuvered close to the ground, where it's susceptible to bolt cropper attacks.

9 mm chain locks

At 9 mm, chain locks start to get significantly more secure, and many have Sold Secure Gold ratings.

However, be aware that the Gold rating is usually accompanied by a 2/5 rating from ART (another independent security testing organization), which puts these locks at the lower end of the Gold scale.

Click on the links in the table to check the prices at Amazon (or other retailers).

I’m a big fan of the Kryptonite Kryptolok Series 2 955 Mini [Amazon], which has been my pick for “best mid-security chain” for several years now.

It features an integrated lock, and its short length makes it relatively lightweight (for a chain), and easy to transport. The shorter length also means it’s easier to keep off the ground, either wrapped around the top tube, or through the seat stays.

If you need something longer, the Kryptolok Series 2 comes in 3 other lengths. And there is even a version that uses a combination instead of keys.

The Abus CityChains [Amazon] are another good option. They have better weight to length ratios (they're lighter than the Kryptonite chains). But the Kryptonite chain locks will usually be cheaper, and are also eligible for an optional anti-theft protection, for bikes worth up to $1,500 / £800.

Don't forget, though: 9 mm locks are heavy! Even the short Series 2 955, which has the same internal locking space as a standard size u-lock, weighs more than 4 cans of Coke. And the longer chains are much heavier than that.

Both Kryptonite and Abus sell carry cases and bags that allow you to strap them to your frame. Since these cases keep the chains close to the frame, they should be more successful than most u-lock frame brackets (where the offset center of gravity makes u-locks unstable).

But check out the weights before you buy. Because people can be very surprised when they receive their chain lock and feel the weight in their hands for the first time!

Read my full, hands-on review of the Kryptonite Kryptolok Series 2 955 Mini chain lock.

10 mm chain locks

At 10 mm, we're starting to reach the limits of portable security. For sure: the shorter chains can be used as daily bike locks on the move. But they're very heavy…

Click on the links in the table to check the prices at Amazon (or other retailers).

The shortest (and lightest) 10 mm chain lock in the table above (the Kryptonite Evolution Series 4 1055), is almost as heavy as the 18 mm Kryptonite New York Fahgettaboudit Mini (one of the heaviest u-locks).

It weighs the same as 5.5 cans of Coke. And that's a lot of weight to be carrying around every day.

However, these locks are also very secure. They're all Sold Secure Gold. And several with 3/5 from ART, put them at the higher end of that Gold rating. There’s even one Sold Secure Diamond rated chain lock.

They're still croppable though! If a thief has a large set of bolt croppers and can use the ground for leverage, they can definitely cut this chain lock.

So I would still recommend you keep the 10 mm chains tightly wrapped around your top tube or the top of the seat stays when locking your bike.

Again, the Hiplok Gold [Amazon] is a good choice here. It can be worn around the waist like a belt, so it's easier to carry than the other options.

Be aware, though, it's still heavy: the weight is equivalent to carrying 6.5 cans of Coke around your waist! Read my full, hands-on review of the Hiplok Gold bike chain lock for more information.

What about the other 10 mm chains?

The Kryptonite chains are eligible for optional anti-theft protection for bikes worth up to $2,250 / £1000. And Kryptonite's Key Safe program will replace lost or broken keys. OnGuard’s anti-theft protection is less impressive. It’s only available in the US and applies so many restrictions it’s practically useless.

There's no anti theft protection with the other locks, but they’ll all come with a code for additional or replacement keys.

I think a lot of the locks on the list are more suited for stationary use, as they feature separate padlocks. In fact, the Hiplok Homie [Amazon] chain lock is specifically designed with home use in mind. It's a nice 60" (150 cm) in length, which allows you to secure several bikes at once.

And it comes with an integrated hook, so you can hang it on the wall when you're not using it!

For mobile security, where you might be locking and unlocking several times a day in busy bike racks, an integrated lock is more convenient. It's simply quicker and easier to secure your bike when the lock is integrated into the chain rather than separate.

However, if you favor portability, definitely go for the Hiplok Gold [Amazon], as it's by far the easiest chain lock to carry around. It does feature a separate padlock, so it will take a little longer to lock your bike, but the ease of transport, makes it worth it.

If you favor locking speed, then go for either the Kryptonite Evolution Series 4 1055 Mini [Amazon], the Abus Granit CityChain X-Plus 1060/85 [Amazon] or the Seatylock Viking Gold, as their integrated locks speed things up a bit.

The Seatylock Viking [Amazon] range even has a magnetic mechanism, which makes it much easier to connect the two ends of the lock in a busy bike rack!

If you want to know more, you can read my reviews of the Hiplok Gold chain lock and Kryptonite Evolution chain lock.

A chain lock for the street and the home?

These locks can arguably be used for stationary as well as mobile security. But be aware: in order to be portable, they need to be short. And if they're short, they're difficult to use at home.

So if that's what you're after, proceed with caution...

12 mm chain locks

At 12 mm, we are definitely at the limit of what can be used daily as mobile security. These locks are big and heavy...

Click on the links in the table to check the prices at Amazon (or other retailers).

However, they also provide a very high level of security. Take a look at the security ratings. Not only are they nearly all Sold Secure Gold or Diamond, all those rated by ART receive 3/5 or 4/5.

This makes them more secure than all but the most extreme u-locks.

However, it does not mean they can't be cropped! A thief using a pair of 42" bolt croppers and the ground for leverage may well be able to cut all of these chain locks.

So again, even with these thick chains: keep them as far from the ground as possible.

But with a 12 mm chain you don't have to be quite so careful. There aren't too many thieves that would have the right croppers, the necessary skill and enough body weight to cut a 12 mm chain lock.

The Kryptonite New York Noose [Amazon] is definitely the best 12 mm chain lock. There's a large, circular link at one end of the chain. And by threading the other end of the chain through the circular link, you create a noose which can be tightened around whatever you're locking your bike to.

Why is this so great? Well, it almost doubles the practical length of the chain lock, which means you don’t need to buy such a long one, saving you both bulk and weight!

It also makes it more useful at home as a stationary lock, where usually you'll need a bit more length to work with.

I explain all this in more detail in my review of the Kryptonite New York Noose 1275 chain lock.

Since even the shortest 12 mm locks are right on the limit of what is portable, the longer locks are definitely best used for stationary security at home (or wherever you leave your bike overnight).

The Kryptonite New York [Amazon] chain lock is a good choice here. It comes in three different lengths, with a separate disc lock that has a 14 mm, double locking shackle. And the optional anti-theft protection covers bikes worth up to $3,500 / £1300.

To be clear: any of these 12 mm locks will offer great high security protection at home and on the move if used correctly. But if you're going to use them as mobile protection, please check you're OK with the weight first!

Choosing a stationary chain lock

If we're choosing a chain lock to leave at home (or wherever we leave our bikes overnight), we don't need to worry about the "risk level" questions...

Both bike statistics in the UK and bike statistics in the US suggest that over 50% of stolen bikes are taken from the owner's home. So your bike is actually more at risk at home than it is when it's locked on the street.

With that in mind, my advice is: get the most secure bike lock you can afford. And this means the thickest chain lock you can afford.

And the great thing is: we don't have to worry about how we're going to carry it around!

14 mm chain locks

When we get to 14 mm chains, we’re no longer talking about mobile security. These aren’t locks that you take with you to the shops.

Their bulk and weight mean that generally you leave them wherever you secure your bike overnight.

Click on the links in the table to check the prices at Amazon (or other retailers).

A 14 mm chain lock could be taken out with you occasionally, if you're visiting a particularly high risk area, or you'll be leaving your bike unattended for a long period. But the lightest 14 mm chain lock in the list above weighs the same as 13 cans of Coke!

These locks are very secure indeed. The Kryptonite New York Fahgettaboudit is rated both Sold Secure Bicycle Diamond and Motorcycle Gold.

That's not to say they can't be cropped, though. They can. 14 mm chains can conceivably be cut by the very biggest bolt cutters. But it takes an experienced thief, of considerable weight, who is also able to get the chain in the right position.

So again I'll say: keep your chain as far from the floor as possible. In a bike shed or garage, this might mean installing a wall anchor rather than a floor anchor to use with the chain lock.

To be honest, there's not a huge amount of choice at this level.

With Kryptonite's New York Fahgettaboudit chains, you get a 15 mm double locking shackle, the maximum 10/10 in house security rating (as well as the Sold Secure ratings). Plus optional anti-theft protection which covers bikes worth up to $3,750 / £2000.

With OnGuard's Beast chains, you get a 14 mm, quadruple locking shackle, a maximum 99/100 in house security rating and optional (but useless) anti-theft protection for bikes worth up to $5001.

OnGuard's locks aren't rated by Sold Secure, simply because they haven't been submitted, have no doubt: they are very secure!

Usually, an OnGuard chain lock will be significantly cheaper than those from Kryptonite. However, they're not as pick resistant, and the after sales care and anti-theft protection isn't as reliable.

The Hiplok Noose is another good choice, as the loop end chain enables you to significantly extend the locking options.

15 mm chain locks

There aren’t many widely available, 15 mm chain locks. For example, the very impressive Kryptonite New York Legend is difficult to find these days, but it’s a great lock…

Click on the links in the table to check the prices at Amazon (or other retailers).

It's still theoretically possible for the right thief, in the right position, with the biggest bolt cutters, to crop this chain lock. But I've never heard of it actually happening!

That ART give it a maximum 5/5 stars says it all, really. This is one of the strongest bicycle locks you can buy.

The lock features a 16 mm double locking, shrouded shackle. And optional anti-theft protection covers bikes worth up to $4500 / £2500.

This is a fantastically secure chain lock for bicycles. In fact, from the three big lock brands, it is probably the most secure bike chain available. Read my full review of the New York Legend.

The Artago Stone 68T100 is also an impressive looking lock and more widely available, but I haven’t tested this one.

16 mm chain locks

Finally, at 16 mm, these chains can no longer be cropped by any manual bolt cutters. They can only be defeated by power tools.

And they're incredibly heavy. Not only are they completely non-transportable, you’ll also need to be careful that they don’t damage your bike, just through their weight!

The Protector range from Pragmasis is perhaps the ultimate bicycle chain lock. The 16 mm links are formed from hardened boron steel and are impossible to bolt crop.

It comes with a Squire SS65CS Stronghold padlock, with has a shrouded shackle which is also impossible to bolt crop!

The only way a thief is going to defeat this lock is with power tools, and it will take a long time and make a lot of noise!

Very similar to the Protector range, the Almax Immobiliser Series III is slightly cheaper, (although I’m not sure that it’s available in the US). It’s also made from 16 mm hardened boron steel links. And it comes with the same Squire SS65CS Stronghold Lock.

Personally, I'd go for a Pragmasis chain lock, because I like their environmental policies. But I appreciate that not everyone can afford to be so picky!

Best Chain Lock Summary

There are two types of bicycle chain lock:

1. those light enough to carry around on your bike daily
2. those so heavy they're best used as stationary security

Portable Chain Locks

Portable chains have links that are less than 13 mm thick. And even 12 mm will be too much for many people. They're far heavier than u-locks. But they do have several advantages...

1. Because they're relatively long and flexible, you can secure your bike to a wider range of objects.
2. Because you can wrap them around your seat post or top bar, they can sometimes be easier to transport.
3. They can't be defeated by leverage attacks and are more difficult to cut with an angle grinder (since the links move about when you try to cut them).

However, one big disadvantage they have in terms of security is the fact that the < 12 mm links that make up a portable chain lock can be cropped by manual bolt cutters fairly easily (if they're close to the floor).

And this is why, if you choose a chain lock for portable security, I recommend you secure your bike by wrapping the chain tightly around your top tube or around the top of your seat stays. 

This will keep it away from the ground and make it very difficult (if not impossible) for a thief to crop a decent portable chain lock.

You might have to come up with a different way to protect your wheels, but there's loads of options and at least your bike will be safe!

Please check the weights carefully before you buy, though. Even the shortest portable chain lock will be heavy. If weight is a big issue, then you're probably best off with a u-lock.

The Hiploks have great security to weight ratios. And you've also got the useful option of carrying them around your waist.

For protection in low risk circumstances, the Seatylock Viking Silver chain lock is a good choice. For medium risk, the Kryptonite Kryptoloks or the (even more secure) Abus CityChains are more appropriate.

But if your circumstances are high risk, then the Kryptonite New York Noose or Gold Hiplok chain lock would be my choice.

Stationary Chain Locks

Stationary chains usually have links that are thicker than 13 mm. And there are several reasons why for immobile, overnight security these are the best option...

1. Security: they can’t be defeated by bottle jacks or leverage attacks, are more difficult to attack with power tools (like angle grinders), and if the links are thicker than 15 mm, they can’t be cropped by any manual bolt cutters.
2. Practicality. When you're securing a bike at home, in a garage or bike shed, then the best way to do that is with a ground (or wall) anchor. And chain locks work far better with anchors than any other type of lock. Plus, you can get a chain lock that is long enough to go around several bikes at once!

Of course, any bike lock is only as secure as its weakest link. And this is particularly relevant when we talk about stationary chain locks, which may be used in a shed or garage or even with other bike storage ideas.

Make sure that whatever you secure your bike to is as secure as the chain lock. If you don’t have anything appropriate, then you should invest in a good ground anchor. And make sure you know how to lock your bike properly.

I hope this page has been useful and that it’s helped you find the best chain lock for your bike. Once you've bought a chain lock, don't forget to clean and lubricate it every few months to stop it jamming.

And if you have any feedback or questions, please let me know below…

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