# Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket

The Kryptonite Kryptolok U-Lock combines a 12.7mm shackle with a FlexFrame-U transport bracket. The listing describes a disc-style cylinder, two keys and a sliding dust cover, while customer feedback is positive about sturdiness but mixed on operation and reliability.

- [Original product page](https://bargainpostbox.co.uk/product/kryptonite-kryptolok-12-7mm-u-lock-flexframe-u)
- [View offer](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-12-7mm-u-lock-flexframe-u)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Kryptonite
- Category: Sports & Outdoors > Cycling > Bicycle Parts & Accessories
- Price: 27.89 GBP
- Previous price: 33.24 GBP
- Discount: 16%
- Price checked: 2026-11-14T19:42:24.776Z
- Rating: 4.4 / 5
- Reviews: 823

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing claims the disc-style cylinder is pick and drill resistant. This is a manufacturer claim, not an independently verified security assessment.
- A sliding cover is intended to keep dirt and debris out of the keyway when it is not in use.
- The FlexFrame-U bracket is described as allowing multi-location transport of the U-lock.

## Pros

- A 12.7mm shackle and disc-style cylinder provide concrete security-focused features for a bicycle lock.
- Two stainless steel keys are included, and their ergonomic design is intended to reduce turning torque.
- The included FlexFrame-U bracket provides a way to carry the lock on a bike.

## Specifications

### Lock and cylinder
- Shackle thickness: 12.7mm
- Cylinder: Disc-style cylinder with center keyway
- Cylinder protection: Vinyl coating
- Keyway cover: Sliding dust cover
### Included features
- Keys: Two stainless steel keys
- Transport bracket: FlexFrame-U Bracket

## Before you buy

- Customer feedback reports mixed ease of use and reliability, including accounts of difficulty closing the shackle, removing the lock from its holder, or keeping it working. Consider these reports when weighing convenience and dependable daily use.

## A good fit for

- Cyclists looking for a U-lock with a supplied transport bracket and two keys.
- Buyers who want a sliding keyway cover and a listed 12.7mm shackle.

## Less suited to

- Buyers who need consistently trouble-free mounting or operation, given the mixed customer feedback on ease of use and reliability.

## Customer feedback

Customer feedback highlights perceived quality, sturdiness and security, with some customers also considering the lock worth its price. Experiences are mixed on ease of use and reliability, including reports of trouble closing the shackle, removing the lock from its holder and keeping it working. For buyers carrying the lock on a bicycle, those practical concerns matter alongside the listing's FlexFrame-U bracket and two keys.
- Positive themes: Customers describe the lock as high quality and solid, and praise its security.
- Negative themes: Some customers report problems with installation or removing the lock from its holder.
- Mixed feedback: Ease of use and reliability receive mixed feedback, including reports of shackle-closing difficulties and the lock stopping working.

## Frequently asked questions

### What comes with this Kryptonite Kryptolok?
The listing describes a FlexFrame-U bracket and two stainless steel keys alongside the U-lock.
### Does the lock have keyway protection?
The listing describes a sliding dust cover intended to protect the keyway from dirt and debris when not in use.
### What do customers report about using the lock?
Feedback is positive about quality and sturdiness, but mixed on ease of use and reliability. Some reports mention shackle-closing difficulties and trouble removing the lock from its holder.

## Alternative options

- [Kryptonite Evolution Mini-7 Bicycle U-Lock w/ 4’ KryptoFlex™ Double Loop Cable](https://bargainpostbox.co.uk/visit/kryptonite-evolution-mini-7-u-lock-cable)
- [Kryptonite Evolution 11-14mm U-Lock with FlexFrame-U Bracket](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-12-7mm-u-lock-flexframe-u)
- [Kryptonite Keeper Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock Sold Secure Silver, 12mm Shackle with Mounting Bracket and Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-12-7mm-u-lock-flexframe-u)
- [Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket \(4-Inch x 11.5-Inch\)](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-12-7mm-u-lock-flexframe-u)
- [Kryptonite Kryptolok Standard Bicycle U-Lock w/4-foot Flex Cable](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-standard-u-lock-flex-cable)
- [Kryptonite Evolution Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 14mm Shackle with Mounting Bracket and Keys, High Security Lock for Bicycles Scooters](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)

## Images

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 1](https://bargainpostbox.co.uk/i/TX5d0-5UU76j5AjA9MApDzgDeZjebA-PkHIwhqMwSIwua0h5993nMW2pwdXm9fLqKdfZTZouN3jky1-Yp_4dZW7NrV4M9JH8Ebq5wfAX74Q93-9038ogowcM.jpg)

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 2](https://bargainpostbox.co.uk/i/3dz3CZxhN_YLVy0yZOF86lnWe_t6bVUYPBmy5ACY5-nqlmAtV5hF2axRch8Yx6-BtcLWYK5th9W89k9uLSSQB-XYp9Av3kyuyIj5s4mAvxHmQyoCAGAHY3vi.jpg)

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 3](https://bargainpostbox.co.uk/i/7ENjt9LELJ0WEMb5Q0tgyXRXZLicYCR7ure_UhKxEdavngyMViwbmo4S2WvWBuy7eBTUhfUNb5O7Pe49WUt_jVAQ84J5Q_ozjaYB09TW-wb9rD80AgfIyc_x.jpg)

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 4](https://bargainpostbox.co.uk/i/vSRamBeYvINDwa-InXfS9NsUHOStGDMUrPkysMZyHyxpYiFkyZDomfJ8cL8seAycFTxttQOG90mRha8amWZ6nCOa7XORqOu_mVR5xYWqNJDPyJNeMo8BivI9.jpg)

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 5](https://bargainpostbox.co.uk/i/AoPIimYq49Duc6NnTYwonc2GGZ-Ho-gOTzWPb8MLr1hqLGB_ike2vQdp8xsbRfCR-tgu-U3zAMfOy42fSUQbCOV_bYFW1wZukQUR3id4T_EtVypyG2tfxlc4.jpg)

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 6](https://bargainpostbox.co.uk/i/-FJh0f_MJRKok4_tMRY1DvCPSKdwhmb30wOV9cFsI2p6D31Dp4HtSNxVeACLwP_JPgyE7cEy8XnZgddvXxAhsGYIPrWEf-1nD_yE4twwGRRU4LW4YZXcogo_.jpg)

![Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket — 7](https://bargainpostbox.co.uk/i/VXKICWdW9-OhfTy2W77rVLDSUq2dPV9QtJEgCHmc4PxBBEw1T45dNoQT_m-mjyUnbPXTkwIE6r_aH-khiIj6liYu_lAcyYWKfLZOKr9wTAI8pHXE77s5HknW.jpg)