HomeGadgets10 Best Heavy Duty Bicycle Locks to Protect Your Bike from Theft

10 Best Heavy Duty Bicycle Locks to Protect Your Bike from Theft

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Got your new bike? But before you jump into other bike accessories, its best to get a durable and heavy-duty lock for your bike. If you look at the facts, then you would be dumbstruck to find out that around a million bikes are stolen in the US each year. So, equipping your bike with the best and the reliable bike locks should be your first and foremost priority.

Here, we’ve got a list of some of the best heavy-duty bike locks to look out for this year.

Kryptonite New York Bike Lock

The Kryptonite bike locks were always on the cyclist’s radar. RThe Kryptonite NY U Lock is the new heavy-duty bicycle lock. The compact lock comes with simple operation and has a 16mm hardened steel shackle.

The top U bar locks directly into a crossbar with a dual locking mechanism making it physically impossible to break. The pass-through crossbar design includes an enhanced Anti Rotation feature. It provides excellent protection and strength against twists and cuts.

The Kryptonite bike lock comes with the Key Safe initiative. Registering your keys online will enable you to get an additional set of keys for free in case of key lost. With the whole delivery, you will get 3 sets of keys including an LED replaceable key fob.


  • Very secure and strong
  • Easily mounts to the bike
  • Wider U shaped shackle is long enough to lock the bike easily


  • Bulky and causes stability issues when you are on the bike
  • Bulky to transport
  • Requires additional holder mount to keep the lock when you are riding

Key Features: 16mm hardened steel shackle | Double bolt mechanism | Anti Rotation | 3 sets of keys | LED replaceable key fob

Today's Deal: $40.77 Off
Kryptonite Heavy Duty Key Lock, Black/Yellow, 4in x 8in, Anti-Theft Protection Included
  • 16mm Hardended Max Performance Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage...

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Via Velo U Bike Lock with Cable

The Via Velo U Bike Lock is a heavy-duty bicycle U lock with a 14mm shackle that extends greater security. The bike lock has a 2 in 1 security system that has an extensible 5 ft vandal-proof cable apart from the U lock.

The shackle is made of stainless steel and is extremely hard. It can withstand the most force applied to it, securing your bike from theft. The tough double-bolt crossbar locking mechanism in the lock offers twice the security against force and jacking.

The cable that you get with the bike lock is flexible and made of steel. There is also a high-quality mounting bracket that attaches your lock to your bike while riding. The quick-release bracket column lets you detach the lock with ease. There is also the lock debris cover that keeps dust and dirt away from your lock.


  • Offers excellent and all-round protection
  • The locking mount is good and helps it keep the lock intact while you ride
  • Affordable


  • There are reports of the locks being jammed
  • A bit bulky to carry around

Key Features: 14mm stainless steel shackle | double-bolt crossbar | 5 ft vandal-proof cable | PVC coating | quick release bracket column | 3 sets of strong keys

Bike U Lock with Cable - Via Velo Heavy Duty Bicycle U-Lock,14mm Shackle and 10mm x1.8m...
  • ✔️ DURABLE ALL-WEATHER PROTECTION – Via Velo bike U-lock with hexagonal PVC cover resists...

Related: 10 Best Anti-theft Security Alarms for eBikes and Motorcycles

Kryptonite Keeper

The Kryptonite Keeper is a durable heavy-duty bike lock that offers a good level of protection. It comes with a 12mm hardened steel shackle and has a double deadbolt design. This design withstands forceful rotation and twist attacks and resists breakage.

The Kryptonite Keeper bike lock also comes with two stainless steel keys. Keep in mind to register online for the Key Safe program as Kryptonite will send two replacement keeps if your personal key gets lost.

This bicycle lock is also updated with the disc-style cylinder and a center key way to protect against brute force attacks. There is the side mount snap in the bracket for mounting your lock on your bike frame. You get a lifetime warranty and superior customer support as always from Kryptonite.


  • Offers a good degree of safety to your bike
  • The protective coatings keep the lock and the bike from scratches
  • easy to use


  • Bulky and not so easy to transport

Key Features: 12mm hardened steel shackle | double deadbolt design | two stainless steel keys | Key Safe program | side mount bracket | LED replaceable key fob

Today's Deal: $9.95 Off
Kryptonite Keeper Standard Anti-Theft U-Lock, Heavy Duty, 12mm Shackle, Black, Combination...
  • 12mm Hardened Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks

Related: 12 Best Budget-Friendly eBikes to Buy in 2020

Bare Rugged U Lock with Cable

The Bare Rugged U lock comes is an excellent anti-theft bike accessory that offers you safety. It is a lightweight U bike lock that has a 16 mm hardened ABS Steel shackle coupled with a 4 ft cable.

The double bolt mechanism of the lock ensures extensive holding power and makes it literally impossible to break. The long 4ft cable helps you get added security when you lock your bike in public.

The cable is of high quality and is made of steel with an extensive hard covering. With the lock, you get 3 laser cut aluminum alloy keys. Both the keys and the lock are tested and proved to withstand harsh climatic conditions. You will also get a mounting bracket to carry the lock by bike.


  • Lock is durable and strong
  • Value for money


  • The mounts are wobbly and of low quality

Key Features: 16 mm hardened ABS Steel shackle | double bolt mechanism | 4 ft cable steel cable | lightweight | 3 laser cut keys | mounting bracket |

Bike U Lock with Cable - 16mm Heavy Duty Bike Lock with Key - A Must Have Anti Theft Bike...
  • CUTTING DRILLING LEVERAGING AND PICKING RESISTANT - Our 2.75lb 16 mm Hardened ABS Steel ULock unlike...

UBULOX bike lock

The UBULLOX bike lock is a sturdy and durable bike accessory that comes with 16mm high-quality shackle and a double Bolt barrel. The bike lock is pretty powerful and can withstand harsh conditions and even brute force. The lock barrel is made of pure copper and has a design that prevents forced opening.

The lock’s U bend comes with 3 non-rust keys that have a complex serpentine slot. Moreover, The Silicon cover on the bike lock makes it quite stylish and even acts as a protective layer against dust and dirt.

Apart from the U-lock, you also get a 4 ft double looped steel cable which is coated with PVC. With this, you can lock not only the frame but also the tires.


  • Strong and durable
  • Offers good degree for protection
  • Affordable


  • Heavy and can cause stability issue to your bike at times
  • Require separate mounting brackets for some eBikes

Key Features: 16mm shackle | double Bolt mechanism | Compact and easy to use | 3 non rust keys | 4 ft double looped steel cable | PVC protective coating

UBULLOX Bike U Lock Heavy Duty Bike Lock Bicycle U Lock, 16mm Shackle and 4ft/6ft Length...
  • STURDY & DURABLE: This bike lock is made of 16mm/0.63inch(including 0.1inch environmentally silicone...

Titanker Bike Lock

The Titanker bike lock is yet another heavy duty U bike lock. It comes with a 12mm hardened Zinc alloy shackle that’s nearly unbreakable. It comes with the double bolt feature and has a 3.8mm thick PVC coating.

The 16 mm Titanker bike lock comes with a 4ft long flex cable and a mounting bracket. The flex cable is durable and can help give your bike all-round safety.

The mounting brackets are made of good quality plastics. You can attach the mount onto your bike frame. Unlike the ones you saw above, the Titanker bike lock comes with keyless entry. It has a 4 digital password combination that you need to set in order to use the device. The combination is covered by a dust cover that protects and extends the lock barrel life.


  • Affordable
  • lightweight
  • Digital password lock


  • Stability issues

Key Features: 12mm Zinc alloy shackle | double bolt mechanism | PVC protective coating | keyless operation | Password lock | Good quality mounting bracket | 4ft flex cable

Titanker Bike Lock, Heavy Duty Combination U Lock with 16mm Shackle, 4ft Steel Cable &...
  • Heavy duty combination U lock: The U lock weights 0.8kg/1.76lbs, the steel cable is 0.4kg/0.88lbs....

OnGuard Bike Lock

The OnGuard bike lock is a basic bicycle lock that offers moderate protection to your bike. It comes with a 13mm hardened steel shackle that goes into a double bolt cylinder. There is also a 4ft vinyl coated flexible steel cable that offers added protection.

The X2P double bolt mechanism on the bike lock secures both sides of the shackle to the crossbar. This mechanism makes sure no force or jacking can literally break the shackle from the bolting cylinder.

Comparing with the other bike locks on the list, the OnGuard bike lock isn’t as durable when it comes to reality. Yet, it is good for those who want moderate protection on a lightweight bike lock.


  • Affordable
  • Secure and reliable
  • Wide shackle for more lock-up options


  • Flimsy mounting bracket

Key Features: 13mm steel shackle | X2P double bolt mechanism | 4ft vinyl coated flexible | double bolt cylinder | Side mounting brackets

Onguard Bulldog DT U-Lock with 4-Foot Cinch Loop Cable (Black, 4.53 x 9.06-Inch)
  • 9" shackle combined with 4' braided steel cable let's you lock bike to standard parking meter post...

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Foldylock Compact Bike Lock

The FoldyLock Compact Bike lock is not the old school bike looks you are familiar with. It is by far the most lightweight and compact bike locks that you will ever come across. It’s ideal for mountain bikes, road bikes, and the new eBikes.

The anti-theft bike lock comes with a foldable set of steel links that are literally unbreakable. There are rivets ghat are designed to withstand harsh force from cutting equipment and other things.

The folding bike lock design makes it easy to store and carry. You also get a frame mount that helps you carry the lock wherever you go. It helps you lock the tires onto the frame of your bike. A rattle elimination mechanism is also present on the device that eliminates shaking while it is mounted onto the bike.


  • Easy to carry
  • No complex mechanisms
  • Easy to use


  • Not so strong

Key Features: Hardened steel link | Foldable steel design | easy to use | Bike frame protection | Weather-proof | Compact design |

FoldyLock Compact Folding Bike Lock - Award Winning Patented Lightweight High Security...
  • TOP RATED LIGHTWEIGHT COMPACT BIKELOCK - Best Light Weight Folding Bike Lock. Portable Solid Key...

Amazer Heavy Duty Bike Lock

The Amazer U lock is made of 12mm hardened steel shackle that is covered by a 3” PVC coating. The Shackle coupled with the PVC coating makes it nearly unbreakable from leverage attacks and can resist cutting.

The smart bike lock for all bike types offers keyless entry. You can set a 4 digit passkey and enable quick and easy operation that takes no time at all.

The double bolt mechanism makes the bike lock pretty strong and durable. Unlike other premium bike locks, the Amazer U Lock is lightweight and easy to carry. You get an easy to fix mounting bracket that makes it easy to carry around.

The alloy steel shackle, combined with the polycarbonate cylinder can withstand extreme force and pressure. Moreover, the device is quite weatherproof and can withstand harsh weather.


  • Competitive price
  • Easy to carry
  • Durable design


  • Not so long
  • Can be tricky to connect

Key Features: 12mm hardened steel shackle | Double deadlock mechanism | Keyless operation | 4 digit passkey | PVC protective coating | weatherproof design

Amazer U Lock for Bicycle, U Lock Combination Heavy Duty Bike Lock Combination, 12mm Bike...
  • Why Amazer U lock can keep your bike safe? Amazer U lock is made of 12mm hardened performance steel...

Kryptonite Keeper 785 Chain Bike Lock

The Kryptonite Keeper 785 is a chain bike lock that comes with a hardened deadbolt. Unlike other bike locks, this one here has a flexible 7mm chain that connects directly to the central lock cylinder. The cylinder is drill resistant and withstands harsh force.

The durable steel chain is covered with a nylon cover to protect the bike from scratches. The whole unit is 2.7 ft long but is a bit heavy. Kryptonite Keeper is much secure than other chain locks in the market.


  • Excellent protection to your bike
  • Durable and made of high-quality material


  • Expensive
  • Limited locking option
  • heavy

Key Features: Chain lock system | hardened deadbolt | flexible 7mm chain | nylon protective cover | Comes with 3 keys | weatherproof design

Best Heavy Duty Bike locks – Buying Guide

Why are heavy duty bike locks important?

Leaving your bike on the streets with a normal bike lock might at first feel safe. But in reality, it’s a really bad idea as the normal locks are easily breakable, even with a pair of pliers.
It is important to choose a heavy-duty bike lock as they can withstand even the drill force and other mammoth breakthrough attempts. What’s more, they are more reliable and sturdy and you have a cool head even when your bike is parked on the most crowded streets.

What are the factors to consider before buying bike locks?

Here are the factors to consider before buying a new bike locks:
Type of locks, material, weight, length, and your budget.

What is the best type of bike lock available?

The type and compatibility of your lock determine the degree of protection your bike gets when you’re away. There are at present you can get the normal cable lock, U lock, or the chain lock. It is up to you to, but as far as our tests are concerned, the U locks showed more strength and reliability than any other.

Which material is good for a durable bike lock?

There is literally no use in getting a thick lock that’s made of poor metal alloys cause, they can be easily cracked open. Its always better to go for Steel Alloy or twisted cable wire for better protection. It is also good to look out for the ones that have a good layer of covering that blocks dust and dirt from logging.

Is the weight of the bike lock a big factor?

Unpopular opinion, the Heavy Duty bike locks are heavy. They are heavy and at times can cause stability issues to your ride. If you’re a seasoned rider then its okay to ho for the heavy ones. Also, getting proper mounting brackets can help reduce stability issues.

What length of bike lock is suitable for my bike or ebike?

Length is a key factor and we don’t advise you to go for a short or a long one. It is better to go with any heavy duty locks that offer additional cable. Normally, the U locks are smaller in length but getting the extensive cable can get this obstacle covered.

Is a durable bike lock too expensive?

There are tons of locks you can get at a reasonable price that offers great reliability and durability. We have a mix of both the premium and the budget friendly ones to consider on our list.

 Buying new bike lock for your bicycle is important as it can avoid theft from public places. We have listed some of the heavy duty ones, as well as the chained, moderately rugged ones. You can choose from the list based on your needs, and considering the risk factor before you.


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