The Sram GX Eagle 12 Speed Rear Derailleur Max 52T features an updated cage architecture that provides better chain retention and precise shifts.Riders want the derailleur to do its job shifting on command, whether under climbing load or the stage finish. The GX Eagle™ derailleur gets it done with an updated cage architecture that improves chain management. Refined to work with the new 10-52t cassettes, it’s also backward compatible with the 10-50t versions. Giving riders choice, because that’s how it should be. Finished with the new GX Eagle™ master colourway – to compliment any cassette and chain colourway a rider wants from the Eagle™ Colorsystem. Further proof that the GX Eagle™ derailleur is there for one thing - to do the job.FEATURESBackwards compatible, works with both 10-50t and new 10-52t cassettes.Updated cage architecture provides better chain retention and precise shifts.Comes in GX Eagle™ master colorway as part of Eagle™ Colorsystem and goes with all colors of Eagle cassettes & chains – from Black to Gold to Rainbow, to HardChrome and new Copper.