Updated cage architecture provides better chain retention and precise shiftsRe-engineered mounting system and repositioned Cage Lock button move the important bits out of harms wayComes 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 CopperEagle pulley technology provides greater efficiency, crisper shifting, and quieter operationBackwards compatible, works with both 10-50t and new 10-52t cassettesAluminum cage with lightweight hardwareCompatible with 12 Speed Eagle drivetrains only12sp52Long1to1REDUPC/EAN/GTIN: 710845853494