The DURA-ACE groupset is the result of Shimano's ongoing passion for technology. This is reflected in every single component in the groupset. All components are joined together to work as one, reinforcing each other for unparalleled performance. This is how DURA-ACE achieves ultimate supremacy. The Dura Ace bottom bracket cups for Shimano Dura-Ace FC-R9100 Hollowtech II cranksets.
Material: CroMo steel, aluminum
Weight: approx. 65 g
Case width: 68 mm (BSA)
Bracket type: Hollowtech II