• Kryptonite Evolution Series 4 Long U Lock

        • $69.95 69.95
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Kryptonite Evolution Series 4 Long U Lock

This is a strong U lock, perfect for securing your bike in moderate risk areas. It is made from 14mm hardened steel and the internal mechanism has been reinforced to provide increased security from different styles of attacks.

It is vinyl coated so that it does not scratch your frame. A dustcover protects the cylinder and ensures that the lock is weather-proof. Team this with a cable lock for all-bike protection.

As a leader in action sports security and the creator of the original bicycle u-lock in the bicycle security category in 1971, Kryptonite offers premium quality security products.


  • Bicycle security for moderate to high crime areas, with an extra long shackle
  • 14mm hardened Kryptonium steel shackle
  • Patented double deadbolt locking mechanism for extensive holding power
  • High security ovalised cylinder
  • Reinforced sleeve over crossbar and cylinder provides enhanced security protection
  • Reinforced internal housing increases resistance to twisting and leverage type attacks
  • Offset key location and overhead cam locking mechanism resists leverage attacks
  • Double deadbolt locking for extra strength against leverage attacks
  • Anti-rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise
  • 3 keys, including 1 lighted
  • The Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizes
  • The Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes
  • The mounting system allows for 360-degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry
  • Rotating dust cover over cylinder protects from dirt & grime
  • Vinyl coated and weather-proof
  • U-lock dimensions: 10.2cmx29.2cmx14mm
  • Approved to bicycle Gold Sold Secure standard
  • Approved to Thatcham CAT3

European Testing Agencies

  • In Europe, independent testing agencies put locks through their paces to see how secure they really are, or in some cases are not. Kryptonite holds more than 45 approvals at Sold Secure (UK), ART (NL), VdS (DE), N.F. (FRA), Classe SRA (FRA), SSF (Sweden) and VAREFAKTA (Den). These agencies attacked products with every bit of malice the testers could throw at them and they still held up. We hope this brings peace of mind to our customers; it does to us and we use the products every day ourselves!

Buy Kryptonite Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.

  • Delivery cost $9.99
  • Delivery toUnited States of America
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
  • Pay by Bank Transfer, PayPal or Card


  • Colour: Black - Orange

Interested in Kryptonite Locks?

Locks Buying Guide

  • We've got everything you need to know in our buying guide.

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