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Kryptonite Kryptolok 12.7mm U Lock with FlexFrame U Bracket Review

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By Best Choice team
Checked icon Last updated - July 24, 2025
8.8

Verdict overview

  • worth the money 8.6
  • Simple to use 8.9
  • Security 9.1
  • Durability 8.9
Pros
  • Exceptional theft resistance.
  • Includes a convenient mounting bracket.
  • Comes with a 4ft security cable.
Cons
  • Attachment cheaply made.

Tech specs

recommended uses for product Security
color Black & Steel
pattern LOCK
batteries included No
controller type Hand Control
special feature Anti-Theft, Heavy Duty
warranty description Limited Lifetime Warranty
lock type Keyed Lock
customer reviews4.5 4.5 out of 5 stars 5,284 ratings 4.5 out of 5 stars
finish Vinyl
product dimensions 4.02 x 4.02 x 9.02 inches
shape U Shape
item weight 2.9 pounds
special features Anti-Theft, Heavy Duty
item package quantity 1
control method App
size 4 x 9 12.7mm & 10mm x 122cm
material Alloy Steel
finish type Vinyl
item dimensions lxwxh 4.02 x 4.02 x 9.02 inches
style Standard w cable
batteries required No
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Product Overview

When it comes to bike security, you want the best protection possible. The Kryptonite Kryptolok 12.7mm U Lock with FlexFrame U Bracket is a reliable and effective solution for keeping your bicycle safe. This sturdy lock features a 12.7mm hardened steel shackle that resists hand tools, bolt cutters, and other leverage attacks, as well as a 10mm steel looped cable for additional security. Not only is this lock highly secure, but it s also incredibly easy to use with its combination lock system.

The Kryptonite Kryptolok U Lock is designed to provide maximum protection in any situation. It has an interior locking dimension of four inches by nine inches and a cable length of four inches, making it ideal for anyone looking for a larger size lock for more secure protection. Additionally, the Kryptolok comes with an anti theft protection offer that allows up to 1,750 reimbursement in the event your bicycle is stolen while locked with this product.

The Kryptonite Kryptolok U Lock is perfect for those who want the utmost security for their bikes without sacrificing convenience or ease of use. The combination lock system ensures that no one else will be able to access your bike without knowing your code. Furthermore, the high quality construction of this lock makes it highly durable and capable of withstanding even the toughest conditions and environments.

Another great feature of this product is the Key Safe Program provided by Kryptonite. If you ever lose your keys, they will ship you two new ones at no cost anywhere in the world. This gives you peace of mind that if something happens to your keys, you won t have to worry about buying replacements or having someone else break into your bikes locks.

Overall, the Kryptonite Kryptolok 12.7mm U Lock with FlexFrame U Bracket is an excellent choice for anyone looking for maximum security for their bike without compromising on convenience or ease of use. The combination lock system ensures that no one else can gain access to your bike without knowing your code, while the high quality construction makes it highly durable and capable of withstanding even the toughest conditions and environments. Furthermore, if you ever lose your keys, Kryptonite provides a Key Safe Program which ships two new keys at no cost anywhere in the world giving you peace of mind that if something happens to your keys, you won t have to worry about buying replacements or having someone else break into your bikes locks.

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Frequently asked questions

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The secret behind our reviews

By Best Choice team

Best Choice Team is your go-to source for curated product recommendations across various categories. Leveraging years of industry experience and advanced AI technology, we analyze data from multiple sources to bring you the most relevant and up-to-date product lists.

Our AI-driven approach allows us to streamline the selection process, ensuring that the products we feature align with current market trends and consumer preferences. We aim to provide content that helps you navigate your purchasing decisions with greater ease Like.

Users reviews

88% of reviewers would recommend to a friend, Based on 10,568 Reviews

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