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Shimano Nexus & Alfine CogsShimano 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
Shimano Nexus 21t Cog Silver
$11.00 USD
| Tooth Count | 21 |
| Color | Silver |