SHIMANO NEXUS - Internal Geared Rear Hub - Coaster Brake - O.L.D. 120/127.4 mm - 3-speedWith a reliable, internal 3-speed mechanism, the SHIMANO NEXUS SG-3C41 hub has an integral coaster brake.Internal geared hub for Coaster Brake versionIntegral Coaster BrakeGear Change Support Mechanism | Brake