Ready for riders looking for high performance and good looks. Available in gear ranges to suit any riding style. Features-Largest three cogs are attached to an aluminum spider-Compatible with all 10 speed chains; use SRAM chains for optimum performance-Steel Cogs with shiny weather-resistant finish-SRAM 10 and 11 speed cassettes with 11 tooth cogs have the smallest cog located behind the cassette in the packaging Item Specifications-Cassette Body Type:Shimano/SRAM 8, 9, 10 Speed-Cassette Cogs:11-12-13-14-15-17-19-21-23-25-Range:11-25-Drivetrain Speeds:10