- The Alfine chainset is a light weight sleek 2-piece design using the proven external bottom bracket system
- 2-piece design is both lightweight and stiff for optimum power transfer
- Built in single sided chain guard
- 170 mm crank arm length
- Chainring is for use with 9-speed chains and CS-S500 rear sprocket
- BS thread bottom bracket included for 42.7 mm chain line
- 5-arm 130 PCD
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