Tall, meaty knobs with multidirectional channels provide steadfast traction whether braking hard or decimating corners Tall, meaty knobs with multidirectional channels provide steadfast traction whether braking hard or decimating corners HG - High Grip, 45a durometer, glue-like conforming rubber over a firmer 60a durometer supportive base for uncanny traction Tough - A double layer of light casing, TCS Tough tires are composed of two full layers of casing, bead-to-bead, leaving no area unprotected on our burliest tires TCS - WTB`s Tubeless Compatible System, sealant based tubeless system with improved bead shape