กะโหลก Pressfit Shimano Ultegra รุ่น SM-BB7241-B

SHIMANO ULTEGRA Press Fit Bottom Bracket 86.5 mm shell width 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. FEATURES 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 Weight: 69 g สำหรับจักรยานเสือหมอบ แบบอัด มิติเฟรม 41 x 86.5mm