SRAM NX Eagle 12-Speed Rear Derailleur

If you have an ultra wide range cassette, then the SRAM NX Eagle 12-Speed Rear Derailleur is the one for you, as it was designed just for that. With a max tooth of 50, Eagle pulley technology gives you the crispest shifting ever, which is made quiet and consistently excellent thanks to a type 3 roller bearing clutch.