Kryptonite Evolution Series 4 U-Lock

The Evolution Series 4 carries an 8/10 security rating from Kryptonite, making it a strong choice for urban environments. Its 14mm hardened steel shackle and double deadbolt mechanism are specifically engineered to withstand common leverage and cutting attacks.

This is a compact U-lock with an internal clearance of 1.8 x 2.1 inches. It is best suited for securing your frame to a bike rack or post, but you may need a secondary cable or chain if you want to lock your wheels simultaneously.

The disc-style cylinder is designed to be highly resistant to picking and drilling. It provides a higher level of security than standard pin-tumbler locks, making it much more difficult for thieves to manipulate the locking mechanism.

Yes, the lock features a sliding dust cover that protects the cylinder from dirt, road grime, and debris. This helps keep the internal mechanism operating smoothly over time, especially if you ride in wet or dusty conditions.

The set includes three keys, one of which features a high-intensity light. This makes it significantly easier to locate the keyhole and unlock your bike in low-light or dark conditions.

Weighing in at 1.8 lbs, this lock is designed to balance security with portability. While it is substantial enough to deter theft, it is compact enough to fit in most commuter bags or be carried easily while riding.