Features of the SRAM XG-1080 11-36 10 Speed Cassette Lightweight stamped steel cogs Single aluminum inner cog SRAM 10 and 11 speed cassettes with 11 tooth cogs have the smallest cog located behind the cassette in the packaging Cassette Cogs, 11-13-15-17-19-22-25-28-32-36 Cassette Body Type, Shimano/SRAM 8, 9, 10 Speed Weight, 239 Drivetrain Speeds, 10 Range, 11-36