The UHP tire is a Z-rated street tire and comes in 25- to 50-series sizes.The tire features a solid center rib for high speed steering response, “3D effect” block edges for handling and braking, Hankook’s HPSR (High Tg Polymer & Specific Resin) Compound for wet and dry traction, a high-density nylon reinforcement belt, and multiple grooves and channels to evacuate water.