Add an Alfine hub, cog, spokes, and a rim to this Shimano Internally Geared Hub Small Parts Kit, and you're ready to rock. - Alfine hubs are packaged without small parts and require this kit plus a cog - Nexus hubs are packaged with small parts and cogs and do not require an additional small parts kit - For 11-Speed Hub - Includes CJ-S700 Cassette Joint for Vertical Dropouts *Cassette joint does not fit Di2 Alfine hubs