The 10 Best Bike Locks of 2021

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Our Top Picks
The mini U-lock promises to withstand bolt cutters, and its protective coating helps it hold up to the wear of regular use.
Don't let its affordability fool you—the cable also doubles as a combination bike lock so you won't have to keep track of keys.
The combination-based U-lock is a particularly great pick for those who can’t stand keeping track of small items.
A clever way to store your bike, the lock folds down to a fraction of its size so it won't take up too much space.
Complete with the signature durability of a chain lock, it's pretty lightweight and offers a fair amount of length to work with.
Weighing at just 0.4 pounds, the lightweight lock rolls up to be just 3.5 inches in diameter so it can be stored in your pocket.
Crafted from maximum-performance steel, the lock promises to withstand hand tools, bolt cutters, and more.
The classic U-lock comes equipped with an alarm that will sound the moment someone tries to interfere with your lock.
Best Wearable:
Hiplok Spin at Amazon
The chain lock is wearable around your waist—giving you the security of a bike lock and the flexibility of a cargo-less ride.
Crafted from thick, hardened steel, the chain lock promises to be durable while its five foot length offers plenty of security.

A bike ride isn’t over the moment you step off your bike—it’s over once you’ve stored your bike somewhere safe. For some, that place may be a storage closet or a garage. However, if you just finished your morning commute or completed a quick ride into the city, that place is likely a bike rack. Simply leaving your bike on the rack without protection is risky, so you'll need to use a bike lock to ensure it stays where you last left it—and that your tires stay put as well.

There are multiple bike locks on the market, and they can vary in terms of style, strength, size, and price point. While searching for one may seem overwhelming, the wide variety of locks means you can find one to fit your exact needs.

Here are the best bike locks on the market.

Best Overall: Kryptonite Evolution Mini-7 Bicycle U-Lock with 4’ KryptoFlex Double Loop Cable

Kryptonite 2079 New-U Evolution Mini-7 Heavy Duty Bicycle U Lock
Pros
  • Durable

  • Small

  • Ships with cable

Cons
  • Not large enough to protect both front and back wheels

The Kryptonite Evolution Mini-7 U-Lock is a classic mini U-lock, which comes with a 4-foot cable you can use to secure your front wheel (and any other bike accessories you want to protect). Crafted with maximum performance steel, the U-lock is designed to withstand bolt cutters. It also has a protective vinyl coating to help it hold up to the wear and tear of regular use.

At 7 x 3 inches, the lock is big enough to fit around your bike—but not so bulky that it’ll demand unnecessary space in your bag. And since the lock comes with anti-rattle bumpers to cut down on noise, you can toss the lock in your bag and carry it on the go without giving it a second thought. 

Style: U-lock with cable | Size: 7.01 x 3.27 x 1.18 inches | Unlock Method: Key

Best Budget: Titanker Bike Cable Lock

Pros
  • Long

  • Compact

  • Lightweight

  • Budget-friendly

  • Capable of protecting both front and back wheels

Cons
  • Not very thick

  • Not as durable as some other options

The Titanker Bike Lock Cable is a 4-foot cable that doubles as a combination bike lock. The cable is crafted with cut-resistant steel, and it’s finished with a protective PVC coating to defend against regular wear. The self-coiling cable is long enough to loop around both wheels of your bike and it rolls up into a compact shape between uses.

To secure your bike, simply fasten the ends of your cable together, and set the lock’s combination. Since the lock only requires a combination, you won’t have to worry about keeping track of any keys.

Style: Cable lock | Size: 4 feet long x 0.5 inch thick | Unlock Method: Combination

Best Combination U-Lock: Amazer Heavy Duty Combination Bike U Lock

Pros
  • Small

  • Budget-friendly

  • Great for those who hate keeping up with keys

Cons
  • Not as durable as some other options

  • Not large enough to protect both front and back wheels

Most U-locks open and close using keys, but the Amazer Heavy Duty Combination Bike U-Lock uses a combination for security. This makes it a particularly great pick for those who can’t stand keeping track of small items (and for those who always seem to be losing their keys).

Crafted with cut-resistant steel and finished with PVC coating, the mini lock is small but durable. It also has a dust-resistant cover that helps the lock stay in good shape over time. Despite its durable structure, the lock is fairly lightweight—measuring 1.8 pounds for easy transport.  

Style: U-lock | Size: 10.3 x 7.9 x 1.3 inches | Unlock Method: Combination

Best Folding Lock: Seatylock FoldyLock Compact Folding Bike Lock

Pros
  • Durable

  • Compact

Cons
  • Not large enough to protect both front and back wheels

With 33.5 inches of length, the FoldyLock Compact Folding Bike Lock is designed to help you store any bike no matter the size. While long, it folds into a compact size of 2.35 inches wide, 2.35 inches thick, and 7.48 inches long—making it easy to carry with you on the go.

The space-efficient lock is made with steel and weighs only 2.2 pounds. Thanks to the durable design, it can hold up to bolt cutters, hammers, crowbars, and more.

Style: Folding lock | Size: 2.36 x 2.36 x 7.48 inches | Unlock Method: Key

Best Chain Lock: Titanker Bike Chain Lock

Pros
  • Very durable

  • Lightweight for a chain lock

Cons
  • Not large enough to protect both front and back wheels

The Titanker Bike Chain Lock offers the signature durability of a chain lock, and since it’s relatively lightweight—weighing in at only 1.76 pounds—it's easy to take along in a bag. Featuring a 3.3-foot-long chain, the lock provides a good amount of length for any type of bike.

The chain is made with heavy-duty, cut-resistant steel and it comes inside a protective cloth and cover that cuts down on wear and tear. Both ends of the chain easily snap together and automatically lock, which means you don't have to turn a key every time you secure your bike.

Style: Chain lock | Size: 3 feet long x 2 inches thick | Unlock Method: Key

Best Lightweight: Ottolock Combination Bike Lock

Pros
  • Compact

  • Very lightweight

  • Capable of protecting both front and back wheels

Cons
  • Not as durable as some other options

Lightweight and compact, the Ottolock Combination Bike Lock is one of the most portable bike locks around. It weighs just 0.4 pounds, (for context, that’s less than half of what many bike locks weigh) and since it rolls up to be just 3.5 inches in diameter, it can easily fit in a pocket.

The lock is crafted with stainless steel and coated with a combination of durable Kevlar and anti-scratch plastic. When uncoiled, it can be anywhere from 18 to 60 inches long. The shorter options are great for those who want to save space, but if you’re looking to protect both your front and back wheels, you’ll want to spring for one of the longer locks. 

Style: Cable lock | Size: 3.5 x 3.5 x 1 inches | Unlock Method: Combination

Most Durable: Kryptonite New York Fahgettaboudit Mini Bike U-Lock

Pros
  • Very durable

  • Backed by one-year anti-theft protection

Cons
  • Heavy

  • Expensive

  • Not large enough to protect both front and back wheels

Widely recognized as one of the most durable U-locks around, the Kryptonite New York Fahgettaboudit Mini Bike Lock is designed to withstand cutting from hand tools, bolt cutters, and more.

It's made with maximum-performance steel and it has a durable crossbar (the cylinder at the base of the U-shaped shackle)—making it resistant to rotating and lock picking, too. The lock is relatively small at 9.25 inches long, 5.71 inches wide, and 1.97 inches thick, and it weighs in at 4.53 pounds, which may be a bit heavy for regular transport.

Style: U-lock | Size: 9.25 x 5.71 x 1.97 inches | Unlock Method: Key

Best High-Tech: Crystal Vision Anti-Theft Alarm Bike Lock

Pros
  • Small

  • Budget-friendly

  • Equipped with a very loud alarm

Cons
  • Not as durable as some other options

  • Not large enough to protect both front and back wheels

The Crystal Vision Anti-Theft Alarm Bike Lock has a traditional design that features an alarm that sounds the moment someone tries to interfere with the lock. It's finished with a weatherproof coating to resist rust, and its long U-shaped shackle should loop around the back wheel with ease.

Activating the lock's alarm is optional, so securing your bike without enabling the alarm is simple. If you do enable it, the alert sounds at 130 decibels loud—and with traditional ambulance sirens sounding at 120 to 130 decibels, this alarm will definitely draw attention.

Style: U-lock | Size: 11.3 x 6.5 x 0.5 inches | Unlock Method: Key

Best Wearable: Hiplok Spin

Pros
  • Compact

  • Lightweight for a chain lock

  • Budget-friendly

  • Wearable

Cons
  • Not large enough to protect both front and back wheels

If you're not a fan of carrying around a bag, the Hiplok Spin could be a good choice. Designed with the security of a bike lock and the flexibility of a cargo-less ride, the lock can be worn around your waist. It also comes inside a comfortable cloth cover to protect the steel exterior from additional wear.

Weighing in at 1.7 pounds, the lock is lighter than some other options and it has a combination design to eliminate the need for a key. It's 30 inches long, which might be too short if you wish to secure both your back and front wheels.

Style: Chain lock | Size: 5.63 x 8.99 x 4.43 inches | Unlock Method: Combination

Best for Electric Bike: Kryptonite New York Fahgettaboudit Chain Lock

Pros
  • Very durable

  • Long enough to protect both wheels and/or larger bikes

Cons
  • Expensive

  • Very heavy (15.25 pounds)

When locking up an expensive electric bike, you want a lock that’s durable enough and long enough to get the job done. The Kryptonite New York Fahgettaboudit Chain Lock is crafted with thick steel and is 5 feet long—giving you enough length to secure your bike with some extra length to spare.

The protective nylon exterior covers the chain to avoid scratches on your electric bike. It has a key closure—so you'll need to keep track of a key—and it's finished with a double deadbolt design for extra security. This chain lock is heavier than most at 15.25 pounds, so it might not be the best option if you're always on the go.

Style: Chain lock | Size: 5 feet long x 0.5 inches thick | Unlock Method: Key

Final Verdict

If you're looking for a versatile bike lock, the Kryptonite Evolution Mini-7 U-Lock (view on Amazon) is an excellent pick. A cable lock and a U-lock in one, it will give you all the flexibility you need to lock up both the tires of your bike. It's also designed to withstand a range of attacks, thanks to the double-loop cable and alloy composition.

What to Look for in a Bike Lock

Style

Bike locks come in a range of different styles—and each of these styles has its own strengths and weaknesses. Chain locks tend to be some of the most durable around, but they can also get pretty heavy. U-locks are a classic pick, but they won’t protect both of your tires. Cable locks are often compact and portable, though less protective than some other options. 

Size

Pay attention to the length and the width of the bike lock you’re eyeing. Longer locks are great for protecting both of your tires at once, and thicker locks—specifically, locks with diameters greater than 0.6 inches (or 16 millimeters)—have a better chance at withstanding bolt cutters. 

Unlock Method

Securely locking up your bike is important, but being able to unlock your bike is just as important. Choose a bike lock with an unlock method that works for you. If you're more likely to memorize a combination, a combination lock may be a good choice. If you don't have trouble keeping track of a key, you should be okay with a key-based bike lock.

FAQs

What is the most secure way to lock your bike?

The first step to securing your bike is finding a place to lock it. Look for a bike rack that is cemented to the ground, and if you can, find a rack with multiple bikes on it. If possible, place your bike in the middle of the rack (the harder it is to reach, the harder it is to steal). When you have your bike lock in hand, make sure the lock loops around the frame, the rack, and ideally, both of the tires.

Consider using a heavy-duty chain lock that’s thick enough to withstand bolt cutters, and secure it using another lock, like a U-lock. If it unlocks with a key, keep the keyhole out of reach to make your lock harder to pick, and if it unlocks with a combination, make sure your lock isn't currently displaying the combination.

What is the best way to lock a bike? 

When locking your bike, you want to make sure your lock loops around everything you’re trying to protect. So try to get it around your bike’s frame, both of your tires, and of course, the bike rack. (Anything left unsecured could potentially get stolen). Try to store your bike on a crowded rack in a crowded area to make it more difficult to access. Places with heavier foot traffic, or areas with a lot of visibility, are also a good option.

Why Trust Verywell Fit? 

As a seasoned health and fitness writer, Lindsey Lanquist understands how vital quality product recommendations can be. She is careful to recommend products that are reliable, comfortable, and genuinely well-reviewed by those who’ve tried them.

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