SRAM Force AXS E1 Cassette XG-1270 12-Speedhe new SRAM Force XG 1270 E1 cassette is optimized for electronic 12 speed shifting and features our X Range gearing technology. Smooth, precise shifts, from 10T on up. FEATURES: At least five one tooth jumps on 10 28T, 10 30T and 10 33T cassettes 10 tooth start helps provide a wider gearing range Designed to work with an XDR driver body MINI CLUSTER construction reduces weight and increases durability SPEED: 12 FREEHUB INTERFACE: SRAM XDR GEARING