MS3 Cassettes offer a wide-range ratio for 10-speed MTB sytems.Features:Alloy SpiderSpecifications:Defined Color: Silver Color: Silver Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed Cassette Body Type_1: Shimano/SRAM 8, 9, 10 Speed Drivetrain Speeds: 10Cassette Cogs: 11-13-15-18-21-24-28-32-36-40 Range: 11-40