Shimano - Dura Ace Di2 R9150 TT Group Set 2x11-speed
The Dura Ace R9100 and Dura Ace Di2 R9150 series are 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 superiority of the system compared to the sum of its individual parts.