BOTTOM BRACKET PARTS,BSA BB-R9100, RIGHT & LEFT ADAPTER

SHIMANO DURA-ACE Bottom Bracket
With an advanced seal construction for smoother rotation and small ball bearings to minimize weight, the SHIMANO DURA-ACE bottom bracket is offered in both press fit and threaded options.

• Threaded
• HOLLOWTECH II
• 68/70 mm shell width
• Bottom bracket with small ball bearings for lightweight
• Advanced seal construction for smoother rotation