Shimano DURA-ACE R9100 Bottom Bracket - BSA
The R9100 bottom bracket by Shimano provides smoother rotation with 50% less drag, due to its new seal construction. It also features smaller ball bearings, which are positioned on the outside for lighter weight and better weight distribution.
- Smaller ball bearings for lighter weight
- Advanced seal construction for smoother rotation
- Sealing ensures 50% less drag
- Shell width: 68mm