SRAM GX Eagle AXS Rear Derailleur - 12-Speed, Long Cage, 52t Max, Lunar

Not only does the SRAM GX Eagle AXS Rear Derailleur get the job done, it features everything you have come to expect from SRAM's AXS connect components . It's able to shift on command, whether that's under climbing load, or sprinting to the stage finish.