Shimano R9100 Right & Left Adapter Bottom Bracket

Shimano BB-R9100 Dura-Ace Bottom Brackets a Be the first to rate this product a Shimano BB-R9100 Dura-Ace Bottom Brackets a Bottom bracket with small ball bearings for lightweight a Advanced seal construction for smoother rotation a Available in English (BSA) or Italian threading a BB Shell Width: 68mm/70mm a Average Weight: 65g