The Shimano WH-RS500 rear MTB quick release is an essential accessory for mounting an MTB wheel on a quick release MTB. Very practical as a replacement in case of damage or loss of the original lock. Technical specifications: For rear wheel only; Compatible with all wheels on the market (Mavic, Campagnolo, Fulcrum, etc.) except disc wheels using a thru-axle; Reference: WH-RS500.- For rear wheel only - Compatible with all wheels on the market (Mavic, Campagnolo, Fulcrum, etc.) except disc wheels using a thru-axle - Shimano reference: Y0E898020