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Kryptonite

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

  • Based on 1,026 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Jul 10
Order within 15 hours and 30 minutes
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Size: 4" x 8"


Style: Bike U-Lock


Features

  • 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
  • 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.

Description

The 12mm hardened steel, standard size Combination U-lock 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! This is a standard size u-lock at 4" x 8" which is great for many lock-up scenarios. The Combination U-lock has optional $500 Anti-Theft Protection Offer (registration required) and includes the Kryptonite Combo Safe Program. Register your combination with us at and we'll be able to help should you forget your combination.

Brand: Kryptonite


Special Feature: Heavy Duty,Portable,Lightweight,Compact,Anti-Theft,Resettable


Lock Type: Combination Lock


Item dimensions L x W x H: 1.75 x 6.5 x 10 inches


Material: Alloy Steel


Brand Name: Kryptonite


Recommended Uses For Product: Security, Sports & Outdoor


Number of Pieces: 1


Included Components: Lock


Model Number: 005292


UPC: 720018005292


Model Name: Kryptonite Combo U-Lock Bicycle Lock


Manufacturer Warranty Description: Lifetime


Manufacturer: Kryptonite


Unit Count: 1.0 Count


Manufacturer Part Number: 005292


Item Type Name: Bicycle Lock


Additional Features: Heavy Duty,Portable,Lightweight,Compact,Anti-Theft,Resettable


Lock Type: Combination Lock


Controller Type: Ring


Control Method: Touch


Smart Home Compatibility: Not Smart Home Compatible


Style Name: Bike U-Lock


Color: Black


Shape: U Shape


Material Type: Alloy Steel


Finish Types: Painted


Item Dimensions: 1.75 x 6.5 x 10 inches


Item Weight: 1 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jul 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Awesome ulock. Awesome ulock.
Size: 4" x 8" Style: Bike U-Lock
Review Image by napoleon
Great lock for the price. Nice and small but also long enough to fit around poles and fences. Really lightweight. Easy to adjust and set a new combo.
Reviewed in the United States on June 21, 2026 Reviewed in the United States on June 21, 2026 by napoleon
    • Perfect
Size: 4" x 8" Style: Bike U-Lock
Perfect. Heavy duty and Cover for combo barrel is included as well
Reviewed in the United States on June 23, 2026 by Ranger92175
    • Worth Every Penny! Highly Recommend Worth Every Penny! Highly Recommend
Size: 4" x 8" Style: Bike U-Lock
Review Image by Changyu
Review Image by Changyu
Received the item and I'm extremely satisfied! This combination lock feels heavy and substantial in hand. You can tell right away that the material is incredibly sturdy and durable, which gives me a great sense of security. What surprised me the most is the password-hiding design; the anti-peep effect is excellent. I no longer have to worry about people sneaking a peek when I enter the code. 10/10 for the design details! Solid build, highly recommended! ... show more
Reviewed in the United States on April 25, 2026 Reviewed in the United States on April 25, 2026 by Changyu
    • Works
Size: 4" x 8" Style: Bike U-Lock
I bought this about 4 months ago and so far it is pretty good. I lock my ebike onto the bike rack and it makes me feel a little better about it not being stolen. The one negative is the plastic slide that covers the codes does come off and that kind of sucks.
Reviewed in the United States on October 25, 2025 by Matthew J Adams
    • Good value lock to keep people honest, provides light security
Size: 4" x 8" Style: Bike U-Lock
This has a security level of 4, meaning it's one of the lowest rated that Kryptonite sells, and it's priced that way too. It has about the same security as a general padlock and most padlocks can be cut in seconds. Operation is smooth so far and works great for the purpose. I use this one for the bike rack in my work - which is inside a keycard access bike room and a locked parking garage. Basically, there are two badged doors before you can even get to the bike area. I wanted something I could leave at work for quick trips back and forth. This lock can be easily defeated by 'professional' bike thieves in less than 30-seconds. Kryptonite recommends this only for rural areas and quick stops in non-urban areas, which is accurate. For locking on a street in anywhere with a decent population, look for level 8 or higher. I use the Kryptonite Evolution chain for locking on a road during the day. Yes, the heavy weight (and cost) of higher security locks is not fun but it's better than coming back to a missing bike. Check out the 1-star reviews. ... show more
Reviewed in the United States on October 23, 2023 by Kel
    • Combo lock broke immediately after return window closed
Size: 4" x 8" Style: Bike U-Lock
This lock stopped working right after the return window expired. The combo dials no longer turn and the lock will not lock. Customer service said it would take a long time to respond due to high volume?!?!? That is not a good sign. Pretty disappointing coming from a company I used to hold in high regard. ... show more
Reviewed in the United States on May 28, 2026 by It's me!
    • Works great. Solid, not too heavy. Cheap.
Size: 4" x 8" Style: Bike U-Lock
Used on adult electric scooter. I live in a huge city in Texas and they steal everything all the time here. Locks are a deterrent as we know. Bold thieves have cordless angle grinders and steal in populated areas in broad daylight. Seemingly nobody or nothing stops them. I can't leave my scooter unattended for more than 5 minutes, but if I gotta dash into Circle K for something, it works. If you live in a low crime area, this will do the job. Not too heavy this lock can go in a backpack or even hang off a belt while riding. Heavy locks can offer more security but come with some inconvenience. Mechanism works well. ... show more
Reviewed in the United States on June 17, 2024 by Michael H.
    • Robust! Easy to program your own 4 digit combo comes with good cable!
Size: 4" x 8" Style: Bike U-Lock
This is a very sturdy and imposing lock. I found the combo very easy to change from the factory setting and can easily change it again if I like. This is a good size to use in combo with a cable to keep the wheels of the bike secured along with the frame. This is very heavy, but I think it will be a respectable deterrent to casual opportunists. It had better work, it cost more thank my bike! The cable comes with it and is sturdy and of a perfect length ~ don't be worried, the lock will arrive one day and a few days later the cable shows up! ... show more
Reviewed in the United States on August 19, 2025 by Anonymous

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