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.

• 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