The Shimano Dura-Ace RD-R9250 Di2 12-Speed Derailleur uses Di2 (Digital Integrated Intelligence) technology. With programmed automatic motion at the touch of a switch, the Dura-Ace Di2 rear derailleur is quick, smooth and effortless, making for unmatched drivetrain efficiency.The rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides ANT+ connection to 3rd party devices and replaces the handlebar junction.Shimano Dura-Ace RD-R9250 Di2 12-Speed Derailleur FeaturesButton on the derailleur for Di2 operations, and LED light denotes synchronized shift mode, setting mode and charge requirementsProgrammed automatic...
Best Price: £699.99 from Leisure Lakes Bikes