กระโหลก SHIMANO ULTEGRA BB72-41B

กระโหลกSHIMANO ULTEGRA SM-BB72-41 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. • FEATUREclose • Lightweight maintains efficiency BENEFITclose • Optimum power transfer • 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 • Weight: 77 g (SM-BBR60) 69 g (SM-BB72-41B)