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- Thanks to the reliability of SHIMANO seals and bearings, the SHIMANO ULTEGRA bottom bracket has a long life.
- Optimal power transfer.
- Lightness guarantees efficiency.
- Proven 4-arm DURA-ACE design: unchanged stiffness and low weight.
- 14g weight reduction and reduced friction in half compared to SM-BB6700, while maintaining durability.
- Wide choice of teeth: 53-39T / 52-36D / 50-34D / 46-36D.
- Weight: 69 g.