SRAM XG1275 10-52 XD 12s BLACK EAGLE GXWith an expanded, 520 percent gear range giving riders more ability to spin and recover on the burliest climbs Light and strong Full Pin technology similar to X Dome bringing true 1x gear range to more riders and builds Uses lightweight, precision engineered steel cogs permanently connected with high strength stainless steel pins An open design similar to the X Dome cassette that aids in mud clearance, giving riders crisp shifting performance and