The new SRAM 10-52 12-Speed Eagle cassette is for riders who prioritize all day function over anything else. With an expanded, 520-percent wide ratio gear range giving riders more ability to spin and recover on the burliest climbs. Featuring FULL PIN technology that uses lightweight, precision engineered steel cogs permanently connected with high-strength stainless steel pins. An open design similar to our X-DOME cassette that aids in mud clearance, giving riders crisp shifting performance and longer component life. Features 520-percent gear range utilizing the industry standard XD hub driver. Light and strong FULL PIN technology similar to X-DOME bringing true 1x gear range to more riders and builds. Lunar and black colourway makes the XG-1275 cassette right at home on any build. Specs Speed (CS): 12s Gearing: 10-52t Cog finish (Cassette): Black Technology (Cassette): XG Cog sizes: 10-52t:10,12,14,16,18,21,24,28,32,36,42,52 Driver body interface: XD