This cassette is an ideal choice for mountain bike riders who have a wide range of climbing gears. Offering you great value for money, it enables you to clean up your handlebars and frame by losing the front shifter and mech, all without the expense of an expander sprocket. Tooth range: 11-40/42/46T; 10 Speed Wide Ratio Cassette Compatibility: Shimano / SRAM Material: Alloy (Lockring, Spacers, Spider Carriers) Model Number: csms3/csmx3 (according to your option) Speed:10-speed Wide Ratio Number of teeth: 11-40t/11-42t/11-46t (according to your option) 11-40T: 11-13-15-18-21-24-28-32-36-40T 11-42t:11-13-15-18-21-24-28-32-36-42T 11-46t:11-13-15-18-21-24-28-34-40-46T 11-51T: 11-13-15-18-23-28-33-39-45-51T Chain Compatibility: 10 speed Color: As pictured SRAM MTB derailleurs are generally compatible (check its chain wrap capability) Shimano derailleurs require a longer B-tension screw Compatibility: Shimano or Sram compatible freehubs Shimano / SRAM mid or long cage derailleur only (check its specs for chain wrap capability) For Shimano HG splined freehubs This 11-40/42/46T cassette is an ideal choice for mountain bike riders who want the simplicity of a 1x10 drivetrain, yet still, have a wide range of climbing gears. Offering you great value for money, it enables you to clean up your handlebars and frame by losing the front shifter and mech, all without the expense of an expander sprocket.