Compatible with (XT) and M9000 (XTR) M8000 Series Eleven – speed Shimano rear derailleurs; Direct Mount Native frames and SRAM derailleurs are not supported; Double chainrings are not currently supported; Optimized for using a shimano xt 8000 or 9000 XTR Rear Derailleur With A 10 – 42, 10 – 44, 11 – 45, 11 – 46 rear cassette setup; Triple Chainrings are not supported