microSHIFT XCD RD-M865M 11-Speed Rear Derailleur with ClutchThe microSHIFT XCD RD-M865M 11-Speed Rear Derailleur with Clutch are compatible with Shimano mountain shifters and wide range cassettes. CNC-machined rigid construction partnered with enhanced chain stability allow you to power up and down through a variety of terrains. This is the clutch version and works with 1x setups with cassettes up to 46T. Weighs only 330g.4710495436135