Kryptonite Ring Wheel Lock Put a Ring on It This frame-mounted ring lock immobilizes your rear wheel in seconds, perfect for quick stops at the store or coffee shop. Add an optional plug-in chain or cable to lock the whole bike to a rack. Features Frame-mounted design, locks the rear wheel to stop ride and roll-away theft Flexible mount bracket included, attaches to a wide range of frames Plug-in capability, accepts Kryptonite and AXA plug-in chains and cables (sold separately)Anti-drill cylinder, with a hardened steel shackle Security rating 4 of 10, e-bike approved | Kryptonite | Ring Wheel Lock Black