Shimano Rear Hub Nuts, Cog Snap Ring, & Non-Turn Washers Description: This set of Shimano Rear Hub Nuts, Cog Snap Ring, & Non-Turn Washers works to adapt the solid axle configuration of Shimano Alfine and Nexus hubs for use with various frame dropout configurations. Features: Axle hardware for Shimano internally geared hubs Nexus and Alfine hubs are packaged without small parts and require this kit plus a cog Cassette joint does not fit Di2 Alfine hubs