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- Lightweight to offset weight disadvantage of drivetrain.
- Smoother rotation
- Better sealing performanceDurable enough for mountain bike usage
- For English threaded bottom bracket
- Approx Weight: 73g
This fits your .
In the world of Shimano, the letters XTR stand for the best of the best. The English-threaded M-BB93 bottom Bracket is exactly that. It’s tough, extremely lightweight, and sealed to keep out dirt in the worst riding conditions imaginable. The M-BB93 fits 24mm crank spindles and is compatible with both 68mm and 73mm bottom bracket shells.