Sunrace CSM980 9sp Cassette. Features: Extra-wide range, Super Fluid Drive shift profiling, compatible with SRAM and Shimano 9sp drivetrains Weight-optimized steel rings, engineered polymer spacers, and nickel plated finish Specs: Speed: 9sp Range: 11-40t Cogs: 11,13,15,18,21,24,28,34,40 Weight: 500g Remarks: Fits Tektro Orion, Auriga Pro/Comp/E-Comp, Aquila, Draco, Dorado; TRP Dash-Sport, HY/RD, Spyre(+SLC), Hylex