Bottom bracket cups for Shimano Ultegra FC-6800 Hollowtech II cranksets. 14g lighter weight and half the friction of the SM-BB6700. Bottom bracket bearing cups with smaller than before. …
Reliable Shimano bearings and seals, this bottom bracket has a long service life. The Shimano Tiagra/Sora bottom bracket uses a new seal construction for long-lasting performance. The bottom bracket…