The square-lugged open tread pattern offers stability in loose or wet terrain, while the stiff outside knobs grip at lean angles like nobodyÌÎ_ÌÎ_s business The square-lugged open tread pattern offers stability in loose or wet terrain, while the stiff outside knobs grip at lean angles like nobodyÌÎ_ÌÎ_s business Dirt Rag Magazine`s Editor`s Choice Light - Lighter weight compound conforms to trail objects while still providing a happy balance between low rotational weight and reliability HG - High Grip, 45a durometer, glue-like conforming rubber over a firmer 60a durometer supportive base for uncanny traction TCS - WTB`s Tubeless Compatible System, sealant based tubeless system with improved bead shape