Heavy Duty U Lock Bike Lock - Secure Bicycle Anti-Theft for Outdoor Cycling, Commuting & Parking - Durable Steel U-Shaped Lock for Mountain, Road & City Bikes

Kryptonite Keeper U Lock

This hardened steel shackle and deadbolt from Kryptonite provides extra security for your bike and helmet. Just thread it through the PopLock on your Thousand helmet and lock with one of the two included keys to keep it secure while you explore your city.