Sram GX Eagle B2 Rear Derailleur, Lunar Full View


  • Backward 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

Sram GX Eagle B2 Rear Derailleur


Regular price $135.00 Save $0.00

Shipping calculated at checkout.

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 colorway -- to complement any cassette and chain colorway a rider wants from the Eagle™ Color system. Further proof that the GX Eagle derailleur is there for one thing - to do the job.