Thule(R) Snug-Tite Lock is a One-Key(TM) system used for all your bike rack locking needs. The Snug-Tite lock contains 1 One-Key(TM) lock cylinder and bends for storage. Accommodating most bikes, the Snug-Tite(TM) Lock fits wheels 20"-29" and up to 3" wide tires. There is no wheel removal required. FEATURES: Bike lock Holds four bikes and 160 lbs. total Contains 1 One-Key(TM) lock cylinder No wheel removal required Support arms protect bike frame while holding it securely Light structure for easy storage Accommodates vast majority of bikes Fits wheels 20"-29" and up to 3" wide tires Accommodates bike with wheel bases up to 48"