Brand: ZRACEMaterial: 7075 aluminum alloyHeat treatment: T6Manufacturing process: 3D CNCCompatibility: Perfectly compatible with SRAM EAGLE 12 speed, perfectly compatible with SRAM Direct Mount Crank, compatible with ZRACE HARDROCK Crankcompatible with 10/11/12 speedoffset:3mmWeight: 32T-67g, 34T-75g, 36T 82g, 38T 89g