Special Notes: When selecting new motorcycle tires, be sure they meet the requirements of your motorcycle and its expected usage. Please use our vehicle drop down selector at the top of this page to assist you in choosing a tire for your vehicle. Always refer to your owner’s manual for correct tire specifications for your vehicle. Size 90/90-21 Tire Construction Bias Load Rating 54 (467 lbs.) Speed Rating R (106 mph) Max PSI 38 Load Range B Tread Plies 2 Polyester Sidewall Plies 2 Polyester Position Front Sidewall Blackwall Weight 8.60 lbs. Rim Size 21 Tube / Tubeless Tube Type Directional Yes SAFETY Inspect and check tire pressure often. This is the most important tire-maintenance function you can perform. Refer to your machine's documentation for proper maintenance. Always give tires a gentle "run-in" period of 100 miles to get the feel of new tires--this means they should not be subjected to maximum power, abrupt lean-over, hard cornering, etc. Always match the front and rear tires for optimal handling, safety and performance. Mixing radials, or mixing radials with bias or belted-bias tires, may adversely affect handling and stability. WARNING The charts and information on this page do not imply interchangeability. Consult your machine's manual to determine correct replacements, clearances, compatibility and stability, load-bearing capacity, speed rating, radial vs. non-radial, pattern and tread compound requirements, inflation recommendations and front-to-rear tire matching. Wrong selection can result in tire failure or loss of control with serious injury or death. Tread pattern optimised for use on dirt and gravel roads, cross-country racing and desert tours. Chosen as one of the most aggressive Dual Sport tires by Dirt Bike magazine. DOT compliant but mainly designed for off road use.