SRAM GX Eagle Rear Derailleur - 12-Speed, Long Cage, 52t Max, Lunar

Features 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; including Black, Gold, Rainbow, HardChrome, and new Copper. Specifications CAGE (RD): Long CABLE PULL RATIO: X-actuation SPEED (RD): 12s COLOUR (RD): Lunar CAGE MATERIAL (RD): Aluminum PULLEY BEARINGS MATERIAL: Steel MAX TOOTH: 52