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Shimano Dura-Ace SM-BB7900 Bottom BracketGet superior power transfer on your road bike with the Shimano Dura-Ace SM-BB7900 10-speed bicycle bottom bracket!
- Improved sealing provides smoother rotation and longer durability
- Wider bearing stance increases stiffness, efficiency and stability
Shimano Dura-Ace SM-BB7900 Bottom Bracket
- bb - compatibility:
- Hollowtech II
- ring material: