Shimano RS501 Bottom Bracket
Threaded Type HOLLOWTECH II Bottom Bracket, Tiagra series
- Aluminum, for BSA threaded 68/70mm bottom bracket shell
- Compatible with all road Hollowtech II cranks
- BB Shell Thread: British
- BB Shell Width: 68mm
- BB Bearing: Steel
- Crank Spindle Diameter: 24mm
- Interface: Hollowtech II