Shimano Ultegra 6800 – HollowTech II Bottom Bracket – BB-R60 – English
Shimano Ultegra 6800 BB Cups – HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency.
HollowTech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability.
English Thread 68mm Shell or Italian Thread 73mm shell





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