Kryptonite Evolution LS U-Lock

The 14mm hardened steel shackle is designed to resist common theft methods like bolt cutters and leverage attacks. While no lock is entirely impenetrable, this thickness is significantly more robust than standard locks and is intended for high-security urban environments.

The FlexFrame-U bracket is designed to be versatile and adjustable, fitting most standard bicycle frames. However, if you have an unusually shaped frame or a very small geometry, you may need to experiment with mounting positions to ensure it doesn't interfere with your pedaling.

The lighted key fob is a practical addition for nighttime use, allowing you to easily locate the keyhole without fumbling in the dark. It uses a replaceable battery, so you can keep the light functional over the long term.

Yes, the lock features a sliding dust cover that shields the keyway from debris, rain, and road grime. This helps prevent the internal cylinder from seizing up over time, which is essential for a lock that lives on your bike.

The Key Safe Program allows you to register your key number with Kryptonite online. If you lose all three keys, the company can ship replacements directly to you, saving you from having to replace the entire lock.

At 1.85 lbs, this lock strikes a balance between high-security strength and portability. It is substantial enough to deter thieves but light enough that most commuters find it manageable, especially when using the included frame mount.