G100 cassettes combine microSHIFT's continuously molded cogs with a CNC machined aluminum spider to deliver rapid, precise shifting at a lower weight. Features: Continuously molded cogs are straighter than stamped steel, resulting in more consistent shifting performance from cassette to cassette CNC machined spider saves weight Chrome plated for hardness and corrosion resistance Precision ramps and chamfers for rapid chain movement Compatible with SRAM and Shimano 10-speed systems Aluminum lock ring Specs: Cassette Body TypeShimano/SRAM 8, 9, 10 Speed Cassette Cogs11-12-13-14-15-17-19-21-24-28 Drivetrain Speeds10 Range11-28 ColorSilver Defined ColorSilver