Shimano dura ace 9000 11 speed groupset buildershifting your expectationsthe dura ace series is shimanos lightest most ergonomic and most precise groupset ever as well as delivering the finest mechanical performance it also serves as the core chassis 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 youre riding to win dont settle for almost perfect use ou