Sram GX Eagle Dub 12 speed group kitKit includes:GX Eagle 10-52t compatible Rear DerailleurGX Eagle Trigger ShifterSram DUB Crankset - available in 170mm or 175mm lengthsEagle GX Hollowpin ChainEagle GX 10-52t CassetteChain gap gauge170x32 DUBLunar GreyUPC/EAN/GTIN: 710845854613