Shimano Ultegra SM-BB6800 Bottom Bracket
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Shimano Ultegra SM-BB6800 Bottom Bracket
Shimano Ultegra SM-BB6800 Bottom Bracket Info
The Shimano Ultegra SM-BB6800 Bottom Bracket sits at the foundation of the Ultegra 6800 groupset — and Shimano treated it accordingly. Bearing placement is shifted outward compared to earlier designs, improving load distribution across the axle and reducing the torsional stress that wears bearings down over time. The result is a bottom bracket that spins consistently clean, ride after ride.
Shimano also refined the sealing elements on this generation, with the stated goal of cutting drag significantly versus the previous 6700 series. Smaller steel bearings contribute to weight reduction while maintaining the durability you'd expect from a component that's turning every time you turn the pedals. This bracket is designed to work exclusively with the Shimano Ultegra FC-6800 Hollowtech II crankset — compatibility is not interchangeable with other spindle standards.
Shimano Ultegra SM-BB6800 Bottom Bracket Specs at a Glance
- Threading: English (68mm)
- Compatible crankset: Shimano Ultegra FC-6800 Hollowtech II
- Bearing type: Steel, external bearing design
- Series: Shimano Ultegra 6800
