Shimano Dura-Ace 9100Shimano
The ultimate for engineering efficiency, thousands of hours of testing, all made to go fast. Really fast. The latest Dura-Ace kit from Shimano improves even further on an already proven platform, with fully aero shaping, improved cable pulls for even faster shifting, options for disc and cable brakes, this really is the ultimate group set.
Optimising your input, to maximize output.