The Ecsta STX is engineered to provide extreme performance in all-seasons, providing all-out wet and dry handling to SUVs and light trucks that has been previously reserved for passenger tires. All-season performance. Two wide circumferential and lateral grooves evacuate water from under the tread area to minimize the risk of hydroplaning. Large, stable tread blocks promote a solid footprint and responsive steering under the most demanding conditions. Variable pitch tread blocks assist with road harmonics to produce a quiet ride reducing vehicle cabin noise. Jointless construction and bead reinforcement ensure durability, large contact patch and steering response. A rim protector in the lower sidewall safeguards wheels against curb damage.