GMZ Ivan Stewart Ironman Edition Race Tires While designed for high speed desert running, the GMZ Ivan Stewart Ironman Edition Race Tires are also designed for all terrain use, but thrive in the sand. The medium, single durometer compound is specifically crafted for high performance machines and features a unique lug configuration for greater movement over rugged terrain. Features: All-terrain grip with a focus on high speed desert running Extra-tough 8 ply bias construction Unique lug sipes with parallel grooves for better lug movement over uneven terrain Proprietary tread pattern provides maximum traction and predictable lateral stability Upper sidewall and progressive traction blocks increase forward bite in deep two-track and silt Medium, single durometer compound formulated for high-performance machines Flat contact patch delivers more forward grip and even tread wear For off highway use only Note : Tire only. Wheel not included.