Sram: all-time 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 backwards compatible for the 10-50t versions. Giving riders choice, because that’s how it should be. Finished with the new GX eagle master colorway – to compliment any cassette and chain colorway 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. Specificationsspeed (rd): 12scable pull ratio: x-actuationcage (rd): longmax tooth: 52color (rd): lunarpulley bearings material: steelcage material (rd): aluminum