Mechanical shifting at it’s best The derailleur body features replaceable outer and inner parallelogram links, skid plates, and a toolfree 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, 104BCD TType 34 tooth chainring with clip on guard TType XS-1275 10-52t cassette GX Eagle TType 126 Link 12-Speed Flattop chain