Ultegra level bottom bracket for Shimano Hollowtech II cranksets in press-fit bottom bracket shells.With reliable Shimano bearings and seals, the Shimano Ultegra bottom bracket has a long service life.
Optimum power transfer
Lightweight maintains efficiency
14 g lighter weight and half the friction of the SM-BB6700, while maintaining the same durability
86.5 mm shell width
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