What’s the Best, Strongest Bike Lock for Theft-Proof Security? 5 Reviews

Bicycle theft is epidemic. In my city, I spend more time worrying about my bike getting stolen than my car. It’s true!

The ugly truth is that bike theft is difficult to combat. If your bike is lifted, chances are you won’t see it again.

The best precaution against theft is to buy a good lock and be smart about where you leave it.

The best bike bike locks are secure, virtually unbreakable and simple to use. Unfortunately, the two most popular types are flimsy cables and cheap U-locks.

You might as well put a big bow on it it.

So what’s the best bike lock to keep your ride secure? I wrote this article to review a handful of good, strong bicycle locks, and to explain how to most effectively use them.

For each, I’ll offer pros and cons, and hopefully point you towards some great, proven brands. Let’s look at what’s out there!

What Does a Top Rated, Strong Bike Lock Look Like?

Poorly locked bicycle.

The owner of this bicycle was lucky to just get a note… (photo credit: juicyrai)

If you’re hunting for a good quality bicycle lock that’s nigh unbreakable, there are a couple of essential features you absolutely need.

In a nutshell, it comes down to style and material.

What’s the most effective style?

In my opinion, the best, most secure & theft-proof bicycle locks on the market are U-locks and chains. They can be made from nearly uncuttable metal, and both are convenient to use.

The least effective is the cable lock. Why? Cables are easily cut with bolt cutters. A thief can get through a cable lock in ten seconds. They’re vaguely useful for securing components (like your saddle, for instance), but even that is a risk.

What’s the most effective material?

In my experience, the best and strongest bicycle locks are made from hardened steel, or exotic materials like titanium.

Many cheap bicycle locks are constructed using softer alloys. Bolt cutters, hacksaws, and sawzalls cut cheap metal like butter.

The more expensive kind are made from hardened steel, and they’re impervious to hacksaw and bolt cutter attempts (unless the thief has hours to spend.)

Really, the only way to get through hardened steel or titanium is by using an angle grinder. Unfortunately, thieves use those, but they’re noisy and cause a shower of sparks; in the open they’re very conspicuous.


1) Kryptonite Fahgettaboudit: One of the strongest bicycle locks, with good reviews

  • Pros: Double deadbolt shackle, hacksaw proof, vinyl coating
  • Cons: Weighs about 4 pounds

The venerable Fahgettaboudit U-lock, by Kryptonite, is one of the most unbreakable bike locks you’re going to come across. It’s not the cheapest, but it will give you peace of mind.

The whole lock is made from hardened steel that’ll easily turn away bolt cutters and hacksaws.

True story: I was once hired (legally) by an apartment building to clear out a locker of abandoned bikes. The bolt cutters made swift work of cable locks, but when we came across a Fahgettaboudit, we were stuck.

The lock has a double deadbolt / shackle design (a thief has to cut through both sides to compromise it). It uses a disc cylinder that’s difficult to pick.

This heavy lock weighs over 4 pounds. That’s unfortunate, but worth it for the protection hardened steel adds. The whole lock is covered in a durable vinyl coating that prevents bike scratches.

Note: give the lock cylinder a bit of grease if you keep it in the rain. Also, this lock doesn’t come with frame mounting hardware.

Overall the Kryptonite Fahgeddaboudit reviews really well. It’s one of the toughest and strongest bicycle U-locks around, and therefore it’s on the top of my list.


2) TiGr Mini: A lightweight bike lock that’s also strong, secure and effective

  • Pros: Extremely light, quick to attach / detach, great as secondary lock
  • Cons: Small size makes it less useful for large frames

Many great bicycle locks will review well for security and ease of use, but they fall short in one key category: weight.

Hardened steel is heavy stuff. Conversely, lightweight bicycle locks tend to be less secure. The lighter the steel, the deeper the compromise.

Unless you move away from steel. To titanium.

The TiGr Mini is an amazing little all-titanium lock that’s extremely lightweight. Despite that, it’s one of the strongest U-locks in this category.

The flat shape of the lock body and the ductile qualities of titanium makes cutting a chore. Check it out yourself.Titanium’s natural hardness makes hacksaws ineffective too. The small size of the TiGr mini gives thieves no room to work, and the hardened, stainless steel lock cylinder is difficult to pick.

The TiGr is easy to use. The lock cylinder pops on and off the rivets like magic. You can stretch the TiGr mini around your frame and whatever you’re locking to, then squeeze it closed to attach the cylinder.

The total weight is a featherlight 490 grams (0.9 pounds) and it comes with a frame mount. It’s a wonderful auxiliary lock, good for securing wheel to frame, for example.

The TiGr Mini is comparable in size to a U-lock, 4 inches (10cm) at its widest point, and 10.5 inches (or 26cm) in length. If you have fat tires or a beefy frame, you’ll probably need the larger Mini+.

Small and lightweight, this is one of the best bike locks; it reviews really well and I love using it. Here’s a more in-depth review.


3) Evolution Chain: A nigh unbreakable bicycle chain lock, among the best around

  • Pros: Probably the most secure lock you can find, easy to attach
  • Cons: It’s very heavy

I’m really into chain locks in general, for a few good reasons. First, chains are flexible like a cable, and easy to attach around oddly-shaped items. That’s super handy. Second, hardened steel chain locks are super durable and will probably outlast your bike.

Lastly, they’re incredibly difficult for a thief to cut, even with an angle grinder. The links move around and shift and it’s just not fun to cut through.

The outstanding Kryptonite Evolution chain lock ticks all three boxes. Each chain link is thick and strong, made from six sided (hex style) manganese reinforced steel. Good luck getting through that with a hacksaw!

You’ll be impressed by the size and durability of the links, the pictures just don’t do it justice. It’s latched by a small Kryptonite shackle that’s also reinforced, with a complex, four-cylinder design that mimics their bigger U-locks.

The chain is smartly covered with a nylon fabric material, to protect the links and prevent your frame from being scratched.

This lock is heavy! It comes in at around seven pounds. Good protection has its drawbacks. Weight notwithstanding, I’d swear by a hardened chain like this one. There’s a reason why professional bike messengers use them.

I’ve heard reports that the lock cylinder can get sticky if it gets wet, so be sure to oil it.

The Kryptonite Evolution chain lock reviews really nicely. It’s a very good bike lock with secure, strong features. Not exactly lightweight, but your bike is ultra-secure, so who cares?


4) Bordo Granit:  A foldable bicycle lock with great features, strong and light weight

Pros: Very light, folds up to become extremely portable, unique design

Cons: You need to use the key while locked and unlocking, a bit expensive

Sometimes a great strategy is to throw thieves a curve ball. The unique, foldable Abus Bordo Granit is an interesting lock design that’s efficient but also effective and light in weight.

The lock has locking flexibility like a chain or cable. It consists of 6 metal bars that fold out, each riveted to the next chain-style. Because they’re flat, you can fold it up into a very small size.

It’s one of the best bike locks for both weight and portability. It weighs in at 2.6 pounds, and when folded it is more compact than any U-lock.

The Granit is coated in a rubberized material that prevents it from scratching the hell out of your frame, and it comes with a frame bag and mounting bracket.

The lock cylinder is high quality and difficult to pick. The metal bars are hardened steel; like other high-end bicycle locks the only practical way to break it is by using a grinder.

Notes: The lock must be turned when unlocking and securing, which is a bit of a hassle compared to others that ‘click’ shut. The rivets will loosen as you use it; according to Abus, that doesn’t affect security.

This is a fantastic bicycle lock for a rider who wants a nearly unbreakable system with portability and light weight.


5) Master Lock Street Cuffs: An inexpensive, lightweight bike lock with great utility

  • Pros: Unique design, easy to use, great for tight spaces, inexpensive
  • Cons: You might get strange looks

As mentioned, it’s an advantage to use a unique lock that thieves don’t often see. These awesome ‘street cuffs’, by Master Lock, are a fantastic bicycle lock with some nearly theft-proof features.

These are essentially regular handcuffs, which seems weird until you realize that it totally isn’t. They have a single link chain that pivots on both cuffs. For that reason, it’s really quick and easy to secure your ride in a pinch. Just attach one end to your bike, and the other to a convenient bike rack or signpost.

The cuffs are small, and can be folded to save space in your pack. It’s probably the most portable lock on this list.

They work great on their own, or they make a wonderful “secondary” lock for components. I use them to secure my wheels.

The housing is made from hardened steel, both cuffs and links. They’re only really vulnerable to a grinder attack. Their small size makes them difficult to cut off a frame cleanly, and the unique cylinder is very difficult for a thief to pick.

They’re a lightweight bicycle lock at 2.9 pounds, and have a reach of about 12 inches. If you need more reach, opt for the 9 link version, which is 22 inches long.

Note: If someone digs through your backpack and finds them, you might get some funny looks.

Convenient and inexpensive, these cuffs will get you tons of comments. They’re one of my top bike locks, with positive reviews, good strength and nearly unbreakable construction. Check them out!


Beyond The Lock: Making It Secure and Safe

I’m surprised by how often I see a poorly locked bike. I have even seen bikes with nothing more than a lock securing the rear wheel to the frame (as though a thief couldn’t simply pick it up). The largest and most unbreakable bike lock in the world won’t save your bike if it’s not secured properly.

Don’t lock it up in an alley

If you don’t want your bike to be stolen, don’t leave it somewhere where it can be easily tampered with. Choose a busy place with lots of foot traffic and it will be much safer. People tend to notice things like angle grinder sparks.

Leaving it somewhere tucked away is trouble. It gives a potential thief time and space.

Don’t give thieves room to work

As a rule of thumb, don’t give thieves a lot of room to work on your lock. You want the smallest possible lock that works. That way, they can’t reposition it to make things easier to cut.

Make it more trouble than it’s worth

A thief is going to go for low hanging fruit first. If you make your bike seem like a lot of trouble to steal, they’ll probably move on to easier pickings.

How can you do this? Use a small, effective, hardened lock that’s difficult to cut. Secure all your removable components (like the wheels). Lock it up in a conspicuous area. All these things will help.

Learn how to lock it up properly

An excellent bike lock strategy

A good bicycle lock strategy. Neither wheel can be removed, the frame is secure, and there isn’t much room for a thief to work. If possible, run the lock around the seat tube, a chainstay or seatstay for extra security. (Photo Credit: PJ Souders

A lot of people don’t know how to properly lock up their bicycle. I see cables looped around the wrong places, or nothing but the wheel secured.

Ever see a rusty bike lock with just a wheel attached? The thief simply detached the front wheel and made off with the rest of the frame!

Here’s the proper way to do it:

  1. Find a post to lock around.
  2. Remove your front wheel, and place it beside your rear wheel.
  3. Run your lock through your rear wheel, around one of your chainstays or seatstays, then around the post.
  4. This works best with a chain, or a larger U-lock.

That’s all you need to do! In one go, this secures your frame and wheels, with one lock. It allows you to make the most of one lock. If that all sounds like gibberish, check out these awesome diagrams. I prefer the middle technique.

(If you don’t have a removable front wheel, consider a secondary lock to secure it to the frame.)

It’s actually really quick to attach your bike lock in this way, and it’s very effective!

Have a bike theft story to share? I’d love to hear about your experiences, feel free to comment below. Thanks for reading!