Shimano Ultegra - Bottom Bracket - Press Fit - Hollowtech Ii - 86.5 Mm Shell Width.With Reliable Shimano Bearings And Seals, The Shimano Ultegra Bottom Bracket Has A Long Service Life. Read more..
Optimum Power Transfer.
Lightweight Maintains Efficiency.
Dura-Ace Proven 4-Arm Design: Same Stiffness And Lighter Weight.
14 G Lighter Weight And Half The Friction Of The Sm-Bb6700, While Maintaining The Same Durability.
Weight: 69 G
Shimano Ultegra - Bottom Bracket - Press Fit - Hollowtech Ii - 86.5 Mm Shell Width.With Reliable Shi..
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