Shimano Nexus Nexus & Alfine Cogs

Shimano Nexus & Alfine Cogs Shimano Nexus and Alfine cogs will work with either 1/8" or 3/32" chains Fits coaster brake and Internally geared hubs with 3-tab spline pattern drivers 21t Cog Silver Tooth Count: 21 23t Cog Silver Tooth Count: 23 22t Cog