the R9250 Rear Derailleur houses the wireless hardware that communicates with the shift levers, and it's hardwired to the front derailleur and battery, acting as the master link. It’s also the charging point, provides ANT+ connection to third party devices, features the button responsible for all Di2 operations and integrates an LED light for shift..
When developing the Ultegra R8100 series, Shimano took a holistic and 100 % performance-oriented approach, because great speed means great responsibility. Faster than ever before, the 12-speed road groupset scores with unparalleled control and comfort anytime and anywhere – whether in an everyman race, on the hunt for a personal best time or on a c..
With technology trickling down from flagship Dura-Ace, Shimano Ultegra R8170 Di2 Disc Groupset is better than it has ever been before. It perfectly balances performance with value, and the components are slick, reliable, and only create a minimal weight penalty compared to Dura-Ace.FEATURES2x12-speed, disc brake, semi-wireless electronic groupsetRe..