Road Threaded External-Cup Shimano Road Bottom Brackets

Size Guide
Thread Style

  • These BBInfinite Threaded Bottom Bracket Cups work with all Shimano HollowTech road cranksets on the market, from Tiagra to Dura Ace.

    This road bike bottom bracket features alloy cups that are MilSpec MIL-A-8625 Type II anodized for extreme durability. Polymer labyrinth seal bearing covers with integrated bushings keep out dirt and debris while isolating the steel bearing races from the steel spindle, halting creaks, corrosion, and accelerated wear of the crank spindle itself. This bottom bracket for road bikes install with the common Park Tools BBT-9 bottom bracket wrench, but we recommend a socket type. Add this Shimano bottom bracket to your bike today!

  • Technical Specifications

    Weight: Ceramitech: 79g | ABEC-7: 84g

    Frame Width: 68mm

    Frame Diameter: BSA Threaded

    Spindle Diameter: 24mm

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Bottom Bracket Selection Guide