Kumho Ecsta ASX KU21 All-Season Tire - 255/50R17  101Z Advanced belt package constructed using high-tensile steel belt and jointless nylon cap ply to reinforce the tread area, assuring high speed stability Outstanding all-season tread compound improves wear resistance and ride comfort Shoulder blocks with sharp leading edge and a rounded trailing edge to prevent heel and toe wear Ultra hard bead filler maximizes lateral grip and high speed durability Rim protector in lower sidewall safeguards wheel against scratches and abrasions