When you spend a lot of money on a touring bike or motorcycle and it gets stolen a few days or weeks later, it’s really heartbreaking. Therefore, if you really want to protect your bike, it's worth investing in the best bike lock you can afford. 

Honestly, considering how much money it protects, you can even consider buying one or two additional locks for added security. Of course, there are many very good locks to choose from, so I have completed the heavy work and included a variety of different options, and you can combine many of them to get an extra level of security. For more upgrades, please check our guide on certain bike rack options or bike phone mounts.

Although there may be a large number of different designs and options to choose from, their advantages and disadvantages are very clear. This means you can get a good idea of ​​which bike lock you should aim for without having to do more and more research. 

D-shaped locks, also called U-shaped locks, are probably one of the safest lock types currently available. 

One of the main ways thieves try to get through a bicycle lock is to use bolt cutters, which can range from 18 inches to a large 42 inches (the latter is often difficult to hide). With D-Locks, you often get shackles with a diameter of 16 mm to 18 mm, and these shackles are almost impossible to break with manual bolt cutters, even 42-inch bolt cutters.

But the disadvantage is that these D locks tend to be very heavy compared to other lock types. Therefore, if you live in an area with a high crime rate that requires as much protection as possible, you should mainly choose D-Lock.

The chain lock is the next step, and it is easier to cut it using bolt cutters or other techniques.

Cable locks are probably the easiest to cut, so they are mainly used in areas where deterrence and crime rates are not high, or where there are many opportunities for crime (because a simple lock is enough to delay potential criminal activity for thieves).

This largely depends on your use case and your perception of things. In an ultra-common sense, keys are often more secure than combination locks, but you will always find the quality of each type of lock. 

In most cases, a combination lock is very useful because you don't have to carry a key that may be lost or forgotten somewhere. That being said, you must remember a combination, although it should be relatively simple.

Therefore, which one you choose should first be based on your budget (if you have a small one, choose the key), and secondly, whether you prefer to own the key or the combination.

Most bicycle batches tend to be made of steel or hardened steel, some of which contain or are made of titanium. There are also lighter bicycle locks made of Kevlar. 

In most cases, I will tell you not to worry too much about the material, because most locks are made of the same material.

Obviously, the most important aspect of a bicycle lock is its ability to deter bicycle thieves. Well, with Sigtuna bicycle lock, you can get 16mm "Viking Steel", Sigunta's own proprietary formula), which will definitely make life difficult for any potential thieves using power tools. The body itself is also heavy, so you will be protected around this U-bolt.

What's cool is that this lock is equipped with a 1200 braided steel flexible cable to provide you with extra protection. It is also long enough that you can easily install it on two bicycles, so it is very suitable for couples or people with children.

Likewise, it is easy to carry around, and you should certainly be able to fix it around and almost wherever you want.

Honestly, an important part of any lock is deterrence. The 16mm steel and sleek black appearance of the Sigtuna bike lock means that even if someone wants to steal your bike, they will move on as soon as they see it.

Opening and closing the lock is smooth and simple, so you don’t have to worry about being unable to open it. That being said, you will struggle with the fact that it is not weatherproof, so opening it will be a bit difficult.

Fortunately, with a little WD-40 or other lubricant, you can restore it to its full working condition without fussing. 

Finally, a nice feature I want to mention is the locking bracket, which really makes the whole transaction very convenient. Just quickly press the small red button, you can tilt the bicycle lock in any direction that needs to be fixed. I really hope that more bicycle locks can do this.

Overall, the Sigtuna bicycle lock is an excellent all-round bicycle lock that will not break the bank. It is stylish, sturdy, and equipped with great cables, which doubles its usability. If you are looking for a good middle option, this is a good choice.

If you have been looking for a big lock that can protect the entire bike, then I have the lock for you!

Kryptonite New York LS is not only a very durable bicycle lock, but also very large, with an internal lock size of 4 inches x 10.25 inches. Very similar to Sigtuna, it is also made of 16 mm thick steel, so it can withstand some very strong attacks.

Of course, this is in line with your expectations of the quality of Kryptonite and its brand.

The double-latch structure means that the lock is fixed at two points, so you don't have to worry about a single failure causing the loss of your bicycle or other property. Similarly, the disc cylinder can well prevent any lock picking or drilling attempts, so it can keep you safe for longer.

It also has a key slot, making it difficult for potential thieves to use something to attack it and open it.

Unfortunately, the biggest disadvantage here is that because it is a large'ole lock with a lot of protection, it is actually very heavy and a bit difficult to carry. Having said that, if you are in a high-risk or high-crime area, it is actually perfect because the combination of anti-theft technologies provides the same level of protection.

On the other hand, if you live in a remote area where there is not much crime, it may not be as useful, although it is still very worth buying.

Finally, although this may not matter, it is actually a very cool lock, the yellow/black theme is very simple, and at the same time minimal and interesting. Hope this will also serve as a deterrent

Kryptonite New York is a first-class lock, and in terms of the security it provides you and the features it has, it may be one of the best locks you can find. Yes, of course it is more expensive, but when you consider that it can protect hundreds or even thousands of dollars in equipment, the cost doesn't seem too bad.​​​

Although not as expensive or fancy as Kryptonite, if you don't want to leave a big hole in your wallet, Via Velo is still a very good bicycle lock.

At 14 mm, the shackle is very durable and can withstand all types of pressure. It is still a difficult situation for anyone who wants to open it with bolt cutters. Coupled with the overall PVC shell around the shackle, so there is some extra protection there.

Likewise, the design of the lock makes it tamper-proof, which is great for such a cheap lock. 

You can also prepare a beautiful 180 mm steel cable for yourself, which will help to fix your bike, whether it is wrapped around two wheels or fixed to a fixed point. There is also a super convenient mount that can install cross bars with a diameter between 20 and 42 mm.

Of course you will also like the keyhole cover, it helps to withstand all kinds of weather. 

To be honest, there is nothing to say about Via Velo, except that it is a stable and high-quality lock, and the price is quite amazing. If you put all the security features together, you will get a sturdy lock that can take a big hit before it is sent out, and hopefully, through any point the bicycle thieves are willing to invest in.

The added cable and two keys also make it an attractive bag, so if you don't want to spend $100 on a bike lock, you should check it out.

If you don't necessarily want a large U-shaped lock and prefer to use a chain, then Kryptonite Evolution Series 4 is a great choice for locking your bike. In addition, if it is electric, you can lock it directly in the brake disc at any time, so you may not even need a chain.

As a smaller bicycle lock, the shackle is only 14 mm, although it is still thick and very suitable for deterrence, especially considering that it might be installed in a difficult place. Although there is no external coating such as PVC on the shackle, the cylinder itself is a disc type, so it can prevent drilling and lever attacks, which is great.

The keyhole also has a dust cover to help prevent rust or wear of the cylinder. Unfortunately, it can be unlocked by a very skilled unlocker, although this is to be expected considering the price, even so, don't let it let you leave the Series 4, this is still not easy.

In addition, the cylinder will lock from time to time, but some WD-40 should be able to solve this problem correctly, just like using Sigtuna. I also particularly like that it has a double lock tongue, although its lock is a bit small.

By the way, when I did some research on the lock, I found that someone used it to lock their guitar and put it on their neck, obviously it played a very good deterrent effect. Therefore, if you still want to protect the safety of your guitar, this might actually be a good choice!

All in all, Kryptonite Evolution Series 4 is a big lock in a small package. Yes, there are not as many use cases as big locks because you need a chain or place it on a disc brake, but for these applications, it is great. The anti-drilling and anti-pull security is very useful, although it will be marked off because it is easier to pick the lock.

All the bicycle locks we have seen so far are key-based and are essentially U-shaped locks, but maybe this is not necessarily what you want. With XZSUN, you can get a pin-type lock with a flexible cable, which is easy to carry.

The wire itself, 120cm long, is braided from steel wire. Although it is not very thick, it is thick enough and it is quite difficult to cut it.

The external vinyl coating on the cable itself helps prevent tampering, it provides at least a little extra security, and it also helps to avoid scratching your equipment. Finally, the cable is automatically coiled, so you don't have to worry about handling it into a small size for storage. 

But one thing I want to say is that the length of the cable may be just enough to cover two wheels, but if you have more than one wheel, it may not be so easy to use. It may also not be long enough to connect two bicycles to a rack or other fixed point. That being said, you can use this bike lock for many different things, not just your bike, so there is a silver lining there.

Much like the other bikes on the list, it is equipped with an easy-to-use stand, so you don't have to worry about carrying it in a bag or basket. 

The best thing is probably the No. 5 flip lock. No. 5 can prevent someone from trying to brute force it. The combination is easy to change, the tumbler itself is easy to turn and very smooth. The most important thing is that the whole thing is covered by PVC, which greatly helps weatherproof and tampering. 

If you are looking for a flip-up flexible cable lock, XZSUN bicycle lock may be one of the best locks you can find on the market. It is true that it is not as thick as some of the other options here, but it does provide good protection in a lightweight and easy-to-carry product.

The only real disadvantage may be the length of the cable, so you should take a few measurements to make sure it is sufficient for your needs.

Yes, that's right. AU locks are usually thick, while cable locks are thinner and easier to cut through. Having said that, they each have their own advantages. Although cable locks are thinner, they are also lighter and easier to carry, while U-shaped locks are usually large and heavy.

Almost anything can pass, the real question is how much effort is required. For example, cutting cable locks is easier than cutting U-shaped locks, and cutting thin U-shaped locks is easier than cutting heavy-duty U-shaped locks. After all, you want to choose the most laborious option, so you can have the greatest deterrent effect. Likewise, the strength of locks depends on what they hold.

No, they usually require a lot of hard work and work. In most cases, you may have to use an angle grinder or some other drilling or heavy tool to cut it. Since these tend to be noisy, they are likely to notify people nearby, so it is unlikely that the thief will happen by chance.

Absolutely, but again, it all depends on the effort it requires. Tools are always used to pick locks, but new locks have newer safety measures, so they are often more difficult to pick. Similarly, generally speaking, choosing a lock is not easy, especially on high-end locks, so if you are worried about this, I suggest you choose something more expensive.

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