Kumho Ecsta STX Performance Radial Tire - 265/60R18 110V 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. Rim protector in lower sidewall safeguards wheels against curb damage.