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• 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
•68mm : Threads: 1.37 x 24tpi
•70mm: 1.36 x 24 tpi
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Shimano Ultegra BB-6700
22.98
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