DURA-ACE R9050 Di2
The DURA-ACE series is SHIMANO's lightest, most ergonomic, and most precise groupset ever. As well as delivering the finest mechanical performance, it also serves as the core chasis for our revolutionary Di2 digital shifting system. The extra eleventh gear and numerous other enhancements combine to deliver a truly dominating performance. When you ride DURA-ACE, you're riding to win.