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Tiagra-level BB86 press-fit Hollowtech II bottom bracket
Misc Transition
Spindle-based unit measures left side power to calculate total watts
but the Rear specific tire is reinforced for added puncture protection
and are made for winter rides
BBT-147-12 Tubeless Valves Tiagra-level BB86 press-fit Hollowtech IIFits 12 notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 5053 mm and a minor diameter (inside of notches) of 48. 2 mm, including: BBInfinite T47, Chris King ThreadFit 30, Chris King ThreadFit T47, Chris King ThreadFit T47 24x, Chris King ThreadFit T47 30, Hambini T47, Rotor T47 External 30 mm, Rotor BBright, BB30, BB386EVO, and PF30 thread together 57. 5 mm (2. 264'') outer diameter at point of engagement
