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 (457 lbs.) Speed Rating T (118 mph) Max PSI 40 Load Range B Tread Plies 4 Nylon Sidewall Plies 2 Nylon Position Front Sidewall Blackwall Weight 11.40 lbs. Rim Size 21 Tube / Tubeless Tubeless 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. The Tusk 2 Track Adventure tire was created for riders looking for a high-performance long-lasting tire. Designed to meet the needs of larger adventure bikes whose riders crave challenging terrain. The 2 Track tire provides smooth, predictable on-road performance while also offering excellent off-road capability. The aggressive knobs combined with a premium rubber compound create a performance tire both on and offroad for the ultimate adventure bike experience. Durable rubber compound for confidence inspiring traction and long-lasting wear. Strategically reinforced and connected knob bases to provide increased handling and stability. Large tread blocks for consistent on-road handling. Deep tread gives the tire a tough aggressive look and feel. Tested in the most brutal conditions. Directional. Tubeless and Tube Type ready. D.O.T Compliant. 70% Dirt 30% Street.