M9 Cassettes offer a wide-range ratio for 9-speed MTB sytems.Nickel FinishSteel spiderItem SpecificationsCassette Body TypeShimano/SRAM 8, 9, 10 SpeedCassette Cogs11-13-15-18-21-24-28-34-40ColorSilverDefined ColorSilverDrivetrain Speeds9Range11-40