Sram GX Eagle B2 Rear Derailleur, Lunar Full View

Sram GX Eagle B2 Rear Derailleur


Regular price $125.00 Save $0.00

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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.

Model ID: RD-GX-1-B2


  • 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.


  • Cage (RD): Long
  • Cable Pull Ratio: X-actuation
  • Speed (RD): 12sp
  • Color (RD): Lunar
  • Cage Material: Aluminum
  • Pulley Bearings Material: Steel
  • Max Tooth: 52