
The Shimano Dura-Ace Di2 RD-9150 Rear derailleur is designed to work with the Dura-Ace 9150/9170 groupset or R8050/8070. It plugs in to Shimano's E-Tube wires - SD50, which means it can also work with 9050 Dura-Ace and 6870 Ultegra Di2 shifters. Likewise, it is compatible with all 9050 and 6870 components. The maximum cassette size is 30T.
Original RRP of $899 now at $649.99