Riders want a derailleur that shifts on command, whether under climbing load or sprinting to the stage finish. The GX Eagle AXS derailleur gets it done with everything you have come to expect from SRAM's AXS connect components. The GX Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. Engineered with a variety of rider preferences in mind, it is compatible with SRAM's new expanded range 10-52t cassette and the 10-50t cassette. Showcasing its lineage from the proven GX Eagle mechanical line, the GX Eagle AXS derailleur is there for one thing - to do the job. ** Battery sold separately Details: Model No: RD-GX-1E-A1 Series: GX Eagle AXS Cage: Long Speeds: 12 Max Cassette Teeth: 52 Cage Material: Steel Bearing Material: Steel Color: Lunar Weight: 444 g Battery sold separately Compatibility: Cassette: SRAM Eagle 10-50t & 10-52t cassettes Chain: SRAM Eagle 12-speed chains Shifter/Controller: SRAM AXS controllers