The new Yokohama YK520 builds on the excellent tradition of the Yokohama YK420 line. The new YK 520 delivers yet a higher level of performance, all-season traction, long mileage and comfortable ride. Yokohama YK520 gives you a great choice of HR and VR sizes and speed ratings along with features found only in the best designs. On a scale of 1-10, here are the performance ratings: Wet Traction Dry Traction Cornering Stability Light Snow Traction Noise/Ride Comfort Tread Wear Asymmetric tread design • The inner tread area features heavy siping and optimal groove placement • The outer tread area offers larger reinforced blocks • Multiple cross grooves and heavy siping Progressive rate sidewall design • Increased flexibility in the upper sidewall • Increased rigidity in the lower sidewall • Tapered tread blocks • Four circumferential grooves UTQG: 520  AA