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 or 42 or 46T 10 Speed Wide Ratio Cassette Compatibility: Shimano or SRAM Material: Alloy (Lockring, Spacers, Spider Carriers) Model Number: csms3 or csmx3 (according to your option) Speed:10-speed Wide Ratio Number of teeth: 11-40t or 11-42t or 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 or SRAM mid or long cage derailleur only (check its specs for chain wrap capability) For Shimano HG splined freehubs This 11-40 or 42 or 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.