10 Best U Locks Reviewed as of September 2023

Reviews Scanned

Master Lock U-Lock Bike Lock with Key, U-Lock for Bicycles, Lock for Outdoor Equipment, Black

Outdoor heavy duty bike U-lock is best used as a bicycle lock.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
U-shaped steel bike lock with key; Includes carrier bracket for easy transportation
Bike lock features a hardened steel body and double locking shackle for superior cutting and prying resistance
Bike lock body is 6-1/8 in. (16 cm) wide, with 8 in. (20 cm) shackle length, 4 in. (10 cm) width and 1/2 in. (13 mm) diameter
Includes one u-lock bike lock, two keys

Sale2

Kryptonite Kryptolok Standard Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm Shackle and 10mm x 4ft Length Security Cable with Mounting Bracket and Keys

12.7mm Hardended Performance Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks; 10mm Steel Looped Cable For Additional Security
Interior Locking Dimensions; 4" x 9" Cable Length; 4"
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 $1,750 Reimbursement
Secure Mounting Bracket; Includes versatile Flexframe-U Bracket, allowing you to carry your bike lock during transportation

Schwinn Anti Theft Bike Lock, Security Level 4, U-Lock, Keys, Black

Hardened steel shackle is durable and designed to keep your bike safe, remember to measure your door's backset, cross bore and thickness to ensure you find the right fit
Durable steel U-lock withstands 5,000 of cutting force for maximum theft deterrence
Vinyl covering on both the U-Lock and cable ensures secure locking that is resistant to weather and prevents scratching
Comes with mounting bracket so you can mount directly to your bike
Includes a pair of keys, ensuring you always have a backup and never need to remember a combination

Kryptonite Combo Bike U-Lock Standard, Anti-Theft Security Bicycle Lock, 12mm Steel Shackle, 4-Digit Resettable Combination U Lock for Scooter Road Mountain Bikes

DURABLE DESIGN: This Anti-Theft bike u lock features a 12mm hardened steel shackle that provides high security against theft. This combo u-lock includes an easy to use 4-digit resettable combination and no keys for you to lose
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
PORTABLE SIZE: This is a standard size bicycle u lock which is great for many lock-up scenarios. Size interior locking dimensions are 4" x 8" and exterior locking dimensions are 6.5” x 9.5”
COMBO SAFE PROGRAM: Register your unique 4-digit combination code on our website and our customer service team will be able to help, should you forget your combination
ANTI-THEFT PROTECTION OFFER (ATPO): Up to $500 reimbursement upon registration. Kryptonite stands behind its products by providing an Anti-Theft Protection Offer on specific locks. Created by Kryptonite in 1978, the Anti-Theft Protection Offer is a program that reimburses registered customers for a specific monetary amount in the event their bicycle/motorcycle is stolen due to the opening or breaking of the lock by force

Bike U Lock Combination Sportneer: Heavy Duty Bicycle Locks Set with 5 Ft Security Steel Cable, Keyless U-Lock for Road Bike Mountain Bike Scooter Gate Anti Theft

Keyless & More Secure: The Sportneer combination u lock set uses a unique keyless design which saves you the stress of carrying keys about. You don't need keys here. What you have instead is a 4-digit resettable combination bike lock which offers 10,000 possible passcode combinations. You can easily set or reset the lock to a code of your choice, making the lock tougher to crack.
Additional 5-Feet Steel Cable: The Sportneer U shaped bike Lock comes with an additional 5 feet double looped steel cable with thickness of 0.43 inches(including PVC covering). Moreover, the cable can be used to lock bikes to frames, fences, gates, racks, poles. It is also ideal for locking trolleys, scooters, skateboards, gates, fences, lawnmowers, generators, sports equipment, and more.
Sturdy & Durable: The Sportneer bicycle U-lock is the most dependable bike locks on the market. This 10mm/0.39in thick U-lock is made from hardened zinc alloy, which makes it tamper-proof. Plus, the 4mm/0.16in PVC rubber covering helps to protect your bike from scratches, and the lock from wearing out.
Portable U-Shaped Lock: The size and weight of the Sportneer security bicycle lock make it a more portable and convenient choice for bikers. It's easy to carry Sportneer heavy duty bicycle ulock as it takes up very little space in your bag. As for the adjustable mounting bracket which can fit round pipes up to 60mm/2.36in in diameter, you can mount it on a bicycle frame while riding.
HELPFUL TIPS: Sportneer Bike Lock Set comes with a bike u lock, 5 feet bicycle steel cable, a bike bracket and a double-head screwdriver. Please note that no lock is 100% safe. Never leave your bike in high-crime areas or leave your bike unattended outdoors for long periods of time.

Sale6

Bike U Lock,20mm Heavy Duty Combination Bicycle D Lock Shackle 4ft Length Security Cable with Sturdy Mounting Bracket and Key Anti Theft Bicycle Secure Locks

【Premium Heavy Duty Bike Lock】 This bike lock comes with a 0.86 inch heavy duty shackle and has excellent heat resistant and hydraulic shear resistant. Equipped with a 0.10 inch silicone cover, it can prevents scratch well and provides excellent safety protection for your bicycle.
【Security and Anti-theft】The bicycle lock is built-in imported c grade pure copper look cylinder, which is certified to resist leverage attacks and provides excellent anti-theft performance, so that your bicycle can be protected with the best safety.
【Easy to Install and Use】The combination bike lock is equipped with a 0.45 inch diameter thick steel cable with a length of 4ft and a high-quality mounting bracket, allowing you to easily install and use it without additional tools. It is very user-friendly.
【Portable and Practical】The bicycle U lock size 11.42 × 6.3 inch, which is lightweight and convenient to carry and store. It is widely used in mountain bicycles, road bicycles, and folding bicycles, providing you with high-quality bicycle safety protection.
【Get Satisfied U Lock Bike Lock】Our combination bike lock set includes bike bock, keys, flex cable and mounting bracket for protecting your bike in all directions. If you have any dissatisfaction with anti theft bicycle lock, please feel free to contact us.

USHAKE Bike Combination U Lock, Heavy Duty Bike Combination U Lock Paddle Lock for Bicycle Electric Scooter Motorcycles Metal Fence Gate Anti Theft

【KEYS-FREE】Bike lock combination for security of your, motorcycle, electric scooter, gate. No more worry for forgetting keys with scooter lock with combination.
【COMBINATION】A strong motorcycle lock with easily setup to your own 4 numbers by the fist use. Smooth dials turning gives you confidence for quality.
【STRONG SHACKLE】The bike locks heavy duty anti theft 10 mm hardened zinc alloy shackle resists both cutters and leverage attacks. 4mm PVC coating paddle lock protects the lock from any scratching. Good gate locks for metal fence.
【SOLID CYLINDER & HEAVY DUTY】High security plastic covered cylinder to avoid dust and heavy duty weight (1.25 pounds) U-lock combination for top security of your belongings.
【Customer service】If there is any issues about USHAKE scooter locks anti theft product , Please reset the code to default "0000" before returing and inform us at any time for after sales service and we will follow up closely.

Sale8

Topward Bike U Lock with Cable, Electric Scooter Lock, Heavy Duty Anti Theft Bicycle U-Locks, 20mm Shackle with Silicone Coating and 12mm x 4ft Length Security Cable with Mounting Bracket and 3 Keys

【Anti-theft High Security Bike Lock】This bicycle lock comes with a 0.86inch heavy duty hardened performance steel shackle and high-security disc-style cylinder is pick- and drill-resistant; Besides, it equipped with 0.10 inch innovative soft-touch silicone cover prevents damage to paint
【Built to Last】Shackle, body and supporting elements are made from temper hardened steel for cut and torsion resistance; 20 mm hardened MAX-Performance steel shackle resists bolt cutters and leverage attacks; upgraded 3 durable copper keys with coiled wrist keychains to prolong the life of your lock; upgraded sturdy lock holder design ensures your cycling journey more stable
【Versatile and User-Friendly】This bike U lock comes with a flexible cable and 3 keys, allowing you to easily fasten your bike or scooter to a variety of fixed objects, such as bike racks, poles, or fences. This combination bike lock offers robust protection against theft, ensuring your bicycle or electric scooter stays safe wherever you go.
【Easy to Carry, Easy to Install】 No need to worry about lugging around a heavy bike lock. Our U lock is compact and lightweight, and it comes with a convenient mounting bracket. Attach it to your bike seatpost or frame, and you can effortlessly carry it during your rides. Installing the lock is a breeze, so you can lock up your bike quickly whenever you need to.
【1OO% Satisfaction Guaranteed】The TOPWARD bike lock combination comes with a delicate environmentally friendly carton packaging, including a flexible cable, a mount holder and 3 keys. If for any reason you are not happy, just let us know and our customer service team will immediately resolve the issue or Refund you 1OO% Money Back. No questions asked. Go ahead " ADD TO CART NOW "

DINOKA Bike U Lock with 4ft Flex Bike Cable and Sturdy Mounting Bracket - 16mm, Heavy Duty for Road Bike Mountain Bike Electric Bike Folding Bike

【Double-opening Head】Our DINOKA heavy duty bicycle u lock is a double-opening head, The thief needs to break the bike locks on both sides at the same time to open it, which is safer than a single-opening head ulock. The lock cylinder of the bicycle is made of C-grade pure copper blades and has a precise structure to prevent various technologies from opening. In addition, the bike u lock is equipped with 2 rust-proof copper keys with a complex snake-shaped slot, which is safer to use.
【Sturdy and Durable】This bicycle lock is made of 16mm/0.63 inch (including 0.1 inches friendly silicone sleeve) hardened high-performance alloy steel, which can resist cutting and lever attacks. Our bike d lock will provide more security for your bike.
【Convenient to Lock】The bike u-lock heavy-duty comes with 4 feet/0.48in steel cable which is coated with PVC covering to provide a greater locking method to protect your bike, suitable for bicycles, motorcycles, electric bike, scooters.
【Portable Size】The size of the u lock for bicycle is 7.9 in * 5.1 in, which is the same size of a 9.7in tablet and is convenient to carry. In addition, come with a mounting bracket that is suitable for all-round tripods with a diameter ≤ of 1.18in (30mm).
【Package Includes】You will get 1*bike ulock, 1*4ft flex cable, 1*mounting bracket and 2*keys, it is very easy to install according to our instructions. If you have any questions, please contact us and we will get back within 24 hours.

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

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.

Our Promise to You

We receive a lot of questions about what products we recommend, especially the products on this page. Questions like:

What is the best U Locks for 2022??
What is the best U Locks to buy?
What is the best U Locks to buy on the market?
or even What is the most affordable (most budget friendly, cheapest or even most expensive!!!) U Locks??

All of these above questions make purchase decisions difficult. We know the feeling because we used to be in this weird situation when searching for these items.

Before deciding to buy anything, make sure you research and read the reviews from trusted sources.?Luckily, we use incredibly smart and complicated AI to help find great products. We use our own custom algorithms to generate lists of the best brands and give them our own approval rating to rank from 1st to 10th.

You can see the U Locks of above. This list is updated regularly, so you can be sure that the information provided is up-to-date.

You may?read more about us?to learn how we support this site. Don?t hesitate to? Contact us if something is incorrect or provides misleading information.