SunRace MX8 11-Speed 11-42T Cassette Cassette Body Type:: Shimano Dynasys 11 Speed Mountain,Shimano/SRAM 8, 9, 10 Speed Cassette Cogs:: 11-13-15-17-19-21-24-28-32-36-42 Drivetrain Speeds:: 11 Range:: 11-42 Weight:: 401g