Mastercraft Courser MXT Mud Terrain Radial Tire - 305/55R20 121Q Tire only Advanced technology mold profile provides more tread-to-road contact. Asymmetric design allows for tread pattern tuning. Circumferential grooves allow for ultimate dry traction, increased handling and cornering ability. Silica formulated tread compound is designed for exceptional wet driving performance. This product is not for sale in the state of Arkansas