Shimano GRX BB-RS501 Bottom Bracket Item # 927031
Description
The Shimano Tiagra bottom bracket uses a new seal construction for long-lasting performance.
Specifications:
- Interface: Hollowtech II
- BB Shell Thread: British
- Crank Spindle Diameter: 24mm
- BB Shell Width: 68mm
- BB Bearing: Steel
- Primary Color: Silver