Nitto NT555R All-Season Radial Tire -305/45R18 110V High block rigiditycreates a stable contact patch for optimal launch performance Race compound is less sensitive to heat degradation, providing track-proven durability and even wear for better street performance Racing tread pattern, molded at 6/32 of an inch, allows for a staggered front and rear tire setup Reinforced semi-radial construction provides high-speed stability