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Updated: 25 Nov 2025

10 Best U Locks

#1
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Kryptonite Keeper Standard Anti-Theft U-Lock, Heavy Duty, 12mm Shackle, Black, Combination Lock, Lifetime

Brand: KRYPTONITE
$82.58
⭐ 5
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    12mm Hardened Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks
  • Interior Locking Dimensions; 4" x 8"
  • Key Safe Program; Kryptonite will ship your first 2 keys for free, globally, in the event you lose them.
  • Anti-Theft Protection Offer; Up to $500 Reimbursement
  • Lifetime.Sport type: Cycling
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#2
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KEMIMOTO Bike U-Lock, U Combination Lock with 70.6in Cable Heavy Duty Anti-Theft Mounting Bracket Holder for Bicycles Motorcycles E-Bikes Scooters

Brand: KEMIMOTO
$49.99
⭐ 5
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    No Keys Needed: Forget about losing keys with the KEMIMOTO combination bike U-lock! Its 4-digit customizable code offers thousands of possible combinations, making universal keys useless. To avoid any unlocking issues if you forget your code, it's wise to snap a photo after setting your new combination
  • Enhanced Security: The KEMIMOTO U-lock offers top security with a durable 14.6mm lock and an easy-to-use design. The 70.6-inch cable ensures comprehensive protection anywhere, making it suitable for gates, doors, bikes, e-bikes, motorcycles, scooters, and more
  • All-Weather Durability: This scooter U-lock is designed to resist corrosion from water, dust, and dirt, prolonging the life of your lock. Its weatherproof performance guarantees added security and peace of mind
  • Included Accessories: We've added a padlock holder for convenient storage. Make sure the red button on the holder is aligned directly above the lock number wheel and close to the locking mechanism for a secure fit. Simply press down on the red button to easily remove or insert the lock
  • Sturdy Design: This electric bike U-lock features a plastic exterior and a 14.6-mm interior cylinder made of hardened, high-performance alloy steel. It is designed to resist cutting and leverage attacks, providing increased durability and security
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#3
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Bike U Locks Heavy Duty Anti Theft for Motorbike, Escooter, Motorcycle with 1.2M Steel Cable 4-Digit Resettable Combination

Brand: Generic
$49.80
⭐ 4.7
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    Keyless Convenience-This bike locks heavy duty anti theft, bike u lock combination has a 4-digit resettable combo is convenient without the need for keeping a key with you. Ebike lock with code no more worrying about difficult locks, lost keys or key disconnections. Large u shape bike lock is features 15mm hardened steel shackle, bicycle combo lock anti-theft security, very smooth to lock and unlock. The extra 1.2M steel bike lock cable offers versatility.
  • Greater internal locking space-The heavy duty bike u lock interior locking dimensions: 19x 14cm, Exterior dimensions: 25 x 18cm. Electric bike lock provides more inner space than other bicycle lock and e bike locks to help great lock moer bigger items. The bike lock combination and 5ft steel cable provide ample room to lock the frame and wheels against racks, poles, etc. It's not just about securing the bike frame. Loop it through wheels or helmets and enjoy an extra layer of peace.
  • Sturdy & Durable-The electric bike locks heavy duty anti theft U-lock weight: 1KG, steel cable weight:0.33KG, together they weigh: 1.34KG. This weight makes it more resistant to theftthick 15.5mm is made of hardened high-performance alloy steel, the u lock bike combination head is made of zinc alloy. The combination bike lock is resistant to cutting and leverage attacks and provides excellent anti-theft performance. The bicycle locks heavy duty anti theft enough sturdy and security. The shackle is coated to prevent scratches to your bike. Light weight and easy to carry.
  • Easy to Set & Use-The bike lock for electric bike has a 4-digit resettable anti-theft combo. The ebike locks for adult bikes initial code is 0000. When setting your new code, please first keep the digital wheel in the correct unlock password state before turning the reset disk. Turn the reset disk 90 to set a new password.(When you set a new password, please remember to jot it down or take a photo to avoid forgetting it. ).This bike lock u lock combination and steel cable works well and is beefy enough to stop casual thieves.
  • Multi-purpose-The bicycle combination lock is widely used in ebike/electric bike/escooter/bike/bicycle/motorcycles/gates/doors/barbecue racks, etc. With it, you can lock everything you want, sturdy and easy to use.
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#4
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4 Digit Combination Padlock,Heavy Duty Anti Theft U-Shape Security Code Lock with Adjustable Shackle,for Bicycles, E-Bike,Mountain Bike,Glass Door,Gates,Shed, Fence [ Adjustable Range 160-270mm]

Brand: MumQTam
$25.99
⭐ 4.2
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    ** [ Premium Heavy Duty Bike Lock ] : This bike lock comes with a diameter 0.65 inch heavy duty shackle and has excellent heat resistant and hydraulic shear resistant. Equipped with a 0.10 inch silicone cover,helps to protect your bike from scratches, and the lock from wearing out.
  • ** [ Adjustable Shackle Lock ] : Upgraded 4 digit combination locks come with U-shaped adjustable shackle, which can be full drawn out. The inner diameter of the lock beam can be adjusted up to 270mm, and the shortest is 160mm. It will meet more needs for your indoor and outdoor use.
  • ** [ High Security and Anti-theft ] : This combination lock consists of 4 digits and offers 10,000 combinations. It is more secure than a 3-digit lock. You can set your preferred combination, which is enough to protect your property and your privacy.
  • ** [ More Safety ] : This gym lock is made from zinc alloy and hardened steel material, this fitness lock has the features of anti- rust, waterproof and cutting resistance.With complex serpentine key slot which is safer to use.
  • ** [ Portable and Practical ] : The lock is 345mm (13.58inches) in length and will fit most latches,perfect for indoor and outdoor use.Suitable for mountain bicycles, motorcycles, electric bike, scooters bike, and courtyard gates etc.
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#5
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SIGTUNA Bike Lock - 16mm Heavy Duty Bicycle U Lock Shackle and Mount Holder, 1.2m Steel Chain Cable and 3 High-Security Keys for Road Bike, Electric Bike, Folding Bike, Mountain Bike

Brand: SIGTUNA
$44.99
⭐ 4.6
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    High Safety LevelThis awarded SIGTUNA bike lock is made of 16mm high-performance steel for extensive holding power and resistance against cut and leverage attacks with a wapping high security rating. Suit for bicycles, motorcycles, gates and fences,etc. Get the best security available and protect your ride with Sigtuna bicycle lock!
  • Robust and Pick-resistantThis d lock has a high-security disc-style cylinder and double deadbolt locking mechanism, very effective and certified against leverage attacks. With Sigtuna U-lock, you make the right choice and give thieves no chance!
  • Double Bolt for Double ProtectionBike locks are designed as a double lock mechanism and have a 1.2 metre long cable that allows you to attach your bike to the crossbar to prevent pulling and prying up
  • Amazing ComfortThe cycle lock comes with 3 keys. One of them can be taken with you and used in daily life, and the other two can leave you at home if you lose something carelessly. When you don't use the cycling u-locks, you can attach it to the holder for easy storage.
  • Easy to Use and DurableWith a PVC coated hardened-steel U-shackle, this bike d lock will protect your bike season after season. Locking this d locks for bicycles is like a walk in the park: it opens and locks easily and stores conveniently with the velcro strap. Please watch the video for installation.
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#6
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TenixLox Heavy Duty U Lock, 4 Digit Combination Password Bicycle Lock with U-Lock Shackle, Waterproof, No Key, Bike U Lock for Home, School, TravelÒ€¦

Brand: TenixLox
$42.95
⭐ 4.1
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    Strong and durable zinc alloy material16mm super strong anti-shear U-lock for bicycle,motorcycle,electric car universal.High strength anti-theft 4-digit combination u lock,Waterproof and rustproof.
  • More Security U LockThe 4 digit code is simple to set and easy to remember,Protecting your car starts with a reliable U-lock,which is also a holiday gift for your kids to enjoy a safe ride.
  • Anti-rust Waterproof Bicycle LockZinc alloy material,sturdy and durable,the surface of the lock has been strengthened to effectively prevent rust,adapt to all kinds of outdoor weather,with a service life of up to decades.
  • Easy to Set PasswordOur U-shaped locks have a combination adjuster at the bottom.The design is simple and easy to operate,first dial the code switch from A to B,then set the new password you need,after setting, dial back to the original position,the operation is fast and simple.
  • Portable and Lightwight Very sturdy and lightweight,only 800 grams, 23*15*1.6CM size,easy to carry without increasing the burden of riding.We provide quality products and services and encourage buyers to contact the seller by email at any time.
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#7
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Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys

Brand: KRYPTONITE
$89.29
⭐ 4.6
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    DURABLE DESIGN: This Anti-Theft bike lock features a 13mm hardened max-performance steel shackle with a bent foot anti-rotation design that resists bolt cutters and twisting leverage attacks. The lock disc-style cylinder side keyway is protected by a sliding dust cover and is pick and drill resistant
  • MULTI-FUNCTIONAL: This Kryptonite bike lock is ideal to secure your bicycles, sports equipment, gates and fences, tool boxes & ladders, grills & lawnmowers, skateboards, truck bed and more. Includes a 4ft 10mm Steel Looped Cable For Additional Security
  • SPECIFICATIONS: U-Lock interior locking dimensions are 3.25 in. x 7 in, 13mm steel shackle with a weight of 3.55 lbs. Bike lock security cable is 4 ft. (1.2 m) long and 10 mm wide in diameter. Includes three stainless steel keys with an ergonomic design
  • EASY TRANSFORT with FLEXFRAME-U BRACKET: Includes a versatile FlexFrame U-bracket for quick and secure mounting to your bike frame, ensuring convenient transport without the need for a bag or backpack
  • OPTIONAL ANTI-THEFT PROTECTION: Eligible for Kryptonites Anti-Theft Protection Offer (ATPO) up to $2,500 coverage for registered locks
  • LIFETIME WARRANTY AND CUSTOMER SERVICE: Kryptonite is committed to providing our customers with high quality products, ensuring full satisfaction. If you are experiencing any problems with your product, please reach out to our Customer Experience team. We will work to solve your issue as quickly as possible. We provide our locks with a limited lifetime warranty so you can buy your lock with confidence.
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#8
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UBULLOX Bike U Lock Heavy Duty Bike Lock Bicycle U Lock, 16mm Shackle and 4ft/6ft Length Security Cable with Sturdy Mounting Bracket for Bicycle, Motorcycle and More

Brand: UBULLOX
$27.26
⭐ 4.7
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    STURDY & DURABLE: This bike lock is made of 16mm/0.63inch(including 0.1inch environmentally silicone cover) alloy steel which is cutting-resistant, leveraging-resistant, and drill-resistant. The bicycle lock will provide your bike with more safety.
  • SAFER: The lock cylinder of the bike lock is made by C grade pure copper blade, which has a precise structure to prevent technical opening. The bike u lock comes with 2 rust-resistant copper keys that have complex serpentine slots, it will be safer.
  • CONVENIENT USE: This bike lock comes with a 4feet double looped ends steel cable which is coated with PVC covering, and the whole diameter of the cable is 0.48inch. It will provide your bike with greater locking flexibility and better protection.
  • PORTABLE SIZE: The size of the bike lock is 7.68inch*4.9inch. Comes with a mounting bracket that is suitable for all circular tripod in diameter 30mm. With the portable size, you can put the bike u lock into your bag or mount it on the frame of your bike.
  • EASY INSTALLATION: The mounting bracket holder is easy to install which enables you to store your bike lock quickly when out on a ride. The silicone cover of u lock will protect your bike from scratches. And it will prolong the life of your u lock.
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#9
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Via Velo Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Locks with 8mm Braided Steel and 3 Keys, 4ft Length Security Cable for Bike, Scooter Mountain Road Bike

Brand: Via Velo
$28.86
⭐ 4.8
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    Security & Durability - Via Velo bike U-lock offers robust protection with a 9 mm hardened steel shackle, resisting cutting, prying, and leverage attacks. The set comes with 3 ergonomic keys made of durable stainless steel, ensuring reliability
  • Weather-Resistant & Scratch-Proof: The bike cable is equipped with a scratch-proof, wear-resistant, and water-resistant nylon sleeve cover. This protective cover ensures longevity and prevents scratches on your valuable possessions
  • Convenient and Portable: The U-lock is heavy enough for reliable security yet light enough for easy portability. Its compact size, along with mounting bracket, allows for comfortable storage on the bike frame or in a backpack during rides
  • Versatile Application - Ideal for securing bicycles, sports equipment, gates, fences, toolboxes, and more. The included 4ft steel cable adds flexibility for various locking scenarios, providing comprehensive protection for your belongings
  • LIFETIME LIMITED WARRANTY AND CUSTOMER SERVICE: Via Velo is committed to providing our customers with high quality products . If you are having any problems with Via Velo product, please reach out to our Customer Service Team. Our Team will solve your issue as soon as possible. We give our locks with a limited lifetime warranty so you can buy your lock with confidence
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#10
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Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

Brand: Sportneer
$39.99
⭐ 4.4
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    Portable & Rugged: The Sportneer bike u lock is both portable and heavy-duty. It measures 7.76x5.02inches, with a thickness of 0.67inches/17mm, and weights 1.64lbs. Plus, its unique polygonal lock body design and silicone coating resist water, dust, and dirt, keeping your bike scratch-free and in tip-top shape.
  • Easy to Install & Use: Equipped with a 5ft steel cable and a bracket, the bike lock can secure wheels, frames, or other bikes to posts, fences, or poles. Better yet, the bracket fits bike tubes with a diameter under 26mm/1.02inch-38mm/1.5inch, allowing you to lick your bike with ease.
  • Boosted Security & Anti-Theft: Thanks to the zinc alloy lock core and alloy steel lock head, this bike U-lock can withstand hydraulic shear forces up to 12 tons. Its tough as nails, resisting cutting, sawing, smashing, and drilling to protect your bike from potential theft.
  • Added Convenience and Peace-of-Mind: No more stress of being locked out if you lose your primary key. For extra peace of mind, weve included two bike lock keys so that you can carry one and keep the spare at home or in the office, ensuring you wont be stranded without access to your bike.
  • Wide Applications: Use the bike locks alone or paired with the steel cable--you make the choice! Its perfect for securing bicycles, childrens bikes, electric bikes, ladders, barbecue grills, sports equipment, lawnmowers, gates, and more. Make sure to check the size to ensure a perfect fit.
  • Gorgeous Gift: Looking for a great gift for family, friends, or cycling enthusiasts? This U-lock is the perfect choice, especially for those who need to park their bikes in public places. Its a gift thats sure to lock in their appreciation.
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