Sram Rear Derailleur Gx Eagle Max 52t: LUNAR 12 speed

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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.


  • backwards 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.

speed (rd): 12s
cable pull ratio: x-actuation
cage (rd): long
max tooth: 52
color (rd): lunar
pulley bearings material: steel
cage material (rd): aluminum

Brand SRAM
Barcodes 710845853487
SKUs / Part Numbers RD8137000

Please note: Manufacturers can sometimes change the specification of the products from time to time.