Shimano Bottom Bracket SM-BB72 Press Fit Road 41mmSHIMANO 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. 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 Variety choice of gearing: 53 39T 52 36T 50 34T 46 36T
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Shimano Bottom Bracket SM-BB72 Press Fit Road 41mm