# Kryptonite Evolution Standard U-Lock, 14 mm Shackle

Kryptonite Evolution is a standard-length bicycle U-lock with a 14 mm hardened steel shackle, three keys and a FlexFrame bracket listed as included. Its 1.59 kg listed weight is a notable trade-off for riders who want a substantial lock they can carry on the bike.

- [Original product page](https://bargainpostbox.co.uk/product/kryptonite-evolution-standard-bike-u-lock-14mm)
- [View offer](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Kryptonite
- Model: Evolution
- Category: Sports & Outdoors > Cycling > Bicycle Parts & Accessories
- Price: 42.29 GBP
- Previous price: 53.85 GBP
- Discount: 21%
- Price checked: 2026-11-14T19:42:10.769Z
- Rating: 4.4 / 5
- Reviews: 3277

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

- Listing describes a standard-length shackle and a smaller crossbar design.
- The manufacturer claims a hardened double deadbolt intended to add protection against twist attacks.
- The listing claims a disc-style cylinder that resists picking and drilling.
- A FlexFrame bracket is described as part of the kit for carrying the lock on a bicycle frame.

## Pros

- 14 mm hardened steel shackle is a concrete security-focused specification.
- Three stainless steel keys are listed, so the kit offers spares.
- The supplied bracket is intended to make carrying the U-lock on a bike more convenient.

## Cons

- At a listed 1.59 kg, it adds a substantial amount of weight to a bike or rider's load.

## Specifications

### Identity
- Brand: Kryptonite
- Model: Evolution
### Lock design and features
- Lock type: U lock
- Shackle: 14mm hardened MAX-Performance steel shackle
- Form factor: U Shape
- Security features claimed: Patent-pending hardened double deadbolt design gives additional protection against twist attacks
- Cylinder claim: Higher security disc-style cylinder is pick and drill resistant
- Special feature: Anti-Corrosion
### Controls
- Control method listed: Touch
### Dimensions and installation
- Dimensions listed: 22.9 x 10.2 x 7.6 centimetres
- Weight listed: 1.59 Kilograms
### Materials and protection
- Material listed: Synthetic
- Finish: Vinyl

## Before you buy

- Manufacturer and listing claims describe construction and resistance features, not a guarantee against theft. Check that the standard-length shackle suits the frame and locking point you intend to use.

## In the box

- 1 lock (Included)
- 3 keys (Included)
- FlexFrame holder (Included)

## A good fit for

- Cyclists seeking a keyed U-lock with a hardened steel shackle and a frame-carry bracket.
- Riders prepared to carry a relatively heavy lock for everyday bicycle security.

## Less suited to

- Riders prioritising a lightweight lock to carry on foot or over long rides.
- Buyers who need a chain or cable to reach distant or awkward locking points.

## Customer feedback

Customer feedback describes the lock as sturdy and a useful deterrent, while also reporting mixed experiences with unlocking, reliability and fit. Some mention sticking or the lock coming loose, and some find its weight inconvenient. These are reported perceptions rather than confirmed product faults. The feedback is relevant to a 1.59 kg keyed U-lock, so consider whether carrying it and operating its key mechanism suit your routine.
- Positive themes: Customers describe the lock as sturdy and secure, and some view it as a deterrent to thieves.
- Negative themes: Some customers say the lock feels heavy.
- Negative themes: Some report sticking or that it comes loose quickly.
- Mixed feedback: Ease of unlocking and fit receive mixed feedback.
- Mixed feedback: Durability and reliability experiences vary, including reports of a lock stopping after five years.

## Frequently asked questions

### What is listed in the package?
The explicit contents list names one lock, three keys and a FlexFrame holder. The product title also mentions a mounting bracket and keys.
### How heavy is the Kryptonite Evolution U-lock?
The listing gives a weight of 1.59 Kilograms. Customer feedback also describes it as weighty, which matters if you plan to carry it regularly.
### Does the listing establish a Sold Secure rating?
The product description claims Sold Secure Gold, but that claim is not present in the technical details. Confirm the rating for the exact listing and version if certification affects your choice.

## 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 Kryptolok Standard Bicycle U-Lock w/4-foot Flex Cable](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-standard-u-lock-flex-cable)
- [Kryptonite Evolution 11-14mm U-Lock with FlexFrame-U Bracket](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)
- [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-evolution-standard-bike-u-lock-14mm)
- [Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket](https://bargainpostbox.co.uk/visit/kryptonite-kryptolok-12-7mm-u-lock-flexframe-u)
- [Kryptonite New York Standard Lock with Flex Frame U-Bracket - Yellow, Standard Shackle](https://bargainpostbox.co.uk/visit/kryptonite-new-york-standard-u-lock)
- [KOHLBURG Highest Security Sold Secure Diamond Bike Lock U Lock with 4 Keys \| Large 13.5" x 6.7" Shackle \| Heavy Duty Anti Theft Bike U-Lock with 5.5ft Steel Cable & Bracket \| Ulock for Ebike Bicycle](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)
- [YobiLife Bike U Lock, with Chain Carbon Steel Theft Protection Compact \| All weather durability black finish for rust resistance works with bikes e bikes for scooters multiple mounting options](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)
- [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 - Yellow](https://bargainpostbox.co.uk/visit/sigtuna-wodan-16mm-bike-u-lock-cable)
- [ABUS U-Lock 410K Ultra for Bicycle and e-Scooter - Handy and Robust Bicycle Lock with Practical Holder for Transport on the Bicycle - Bicycle Accessories - Variant 150HB140, Green](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)
- [NDakter Bike Locks,18mm Shackle Heavy Duty Bike D Lock with 6FT/1.8M Steel Security Cable with 3 Keys, Anti Theft Bicycle Lock for Electric Scooter, Motorbike, Dirt-Bike, E Bike, Road Bike Lock Sturdy](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)
- [Heavy Duty Bike U Lock - Super Strong 12 Ton Shear, 20mm U Shape Lock Anti-Theft Silicone Covered Keyhole with Sliding Cover 4ft Steel Cable with Mounting Bracket and 3 Keys \(S\)](https://bargainpostbox.co.uk/visit/alshaay-bike-u-lock-cable-keys)

## Add-ons

- [Kryptonite KryptoFlex Security Cable, 2.6FT/4FT/7FT/30FT Long Braided Steel Flex Bike Lock Anti-Theft Cable with Looped Ends for Outdoor Equipment, U-Lock and Padlock, 5mm-10mm Thick](https://bargainpostbox.co.uk/visit/kryptonite-evolution-standard-bike-u-lock-14mm)

## Images

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 1](https://bargainpostbox.co.uk/i/MbwFGjc9TTryvUXcsLat-Ofj12MV6ma77PKfsljHIpE4BnUIByTheIO_N149gH68Bw11ndnVAgSaku0ay6CipiIwb25vs2-1qRbiexSBFm2ObVMicfUeoU9r.jpg)

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 2](https://bargainpostbox.co.uk/i/mCkAxOuIJMWza3DMV3vzqUSBv_hCtyTg6rLfBhQ8sxtt9NYuCNVwKn29T-sQjL6TVgzt-HLN-h4QzoC4FOHqzoNuxSVibKFtD9sG8dT3uEGYbLkzu-fbC7YA.jpg)

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 3](https://bargainpostbox.co.uk/i/O6T4p2IJeeeQ0c-VBB7g5Cu7ba7Fr-UobGd2ESWnYiKvKFQ55WhN1mE9DkYWMo6AjFBHFAhQHnKoFTyH8JLlSmccY3zk2-gRVkUxL9LB3Y_YP4psw7HYvcvP.jpg)

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 4](https://bargainpostbox.co.uk/i/BE-OHb3thPCajdj84uGBpGpa_sh9gdke_H15opVzDsXwOViSP-rV55oqUKUzZAEpNGc9lcwhMQV93DPagoEMUFP-MjKzfkyKlZKEAa-zHmt54XtAK6Db4dzw.jpg)

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 5](https://bargainpostbox.co.uk/i/JBT1CiQyZM79FytRa96VRNIZ6ngA2kzoDPUHaklk0sYL9Tjg35mi3n3_S7f1DC65dJFlrQuNZIMfyFOK2BiEMEys96-TE8bQcZAZkItL2gAw05xAdtmDW97v.jpg)

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 6](https://bargainpostbox.co.uk/i/OfHhqD_6McQnoffkOORkwrP0jHSa-rhIPOBybT0PDYCJ0lSGx6XNZ9AzHcwB2ZvZIFGhK6I3TiixHQgkWENiMj6fbeGy7PutXAqQfba1ZQitgR7K9Ked6tp-.jpg)

![Kryptonite Evolution Standard U-Lock, 14 mm Shackle — 7](https://bargainpostbox.co.uk/i/KNSmiQB4M2RwxM5haolym7PVEbW13IEhaj0kpZAZMNLS2B8QY3wMvgSBcSy9bFbohz5vtxM4CGlkV7rcisIJlDRo4E1yxoB0sqqsGP-zcdHaCZbd8CsNXBJp.jpg)