- Mechanical shifting at it’s best - The derailleur body features replaceable outer and inner parallelogram links, skid plates, and a tool-free threaded cage assembly - Eagle 90 shift lever features stealth architecture, and MMX compatibility for seamless pairing with SRAM brakes. Cockpit tidying Shift Housing/Brake Hose clip included. - Groupset includes: Eagle 90 rear derailleur, shifter, Eagle 90 ISIS crankarms with 36 tooth with clip on guard. T-Type XS-1275 10-52t cassette. GX Eagle T-Type 126 Link 12-Speed Flattop chain.