Kumho Ecsta XS KU36 High Performance Tire - 205/50R15  86Z Low void asymmetric tread pattern with circumferential grooving for high cornering grip Ultra fine carbon black compounding for maximum traction Ultra wide tread contact with highly rounded shoulders for optimized footprint shape during high lateral loads Developed for quick autocross warm-up while maintaining race track durability W speed rating for optimum run temperatures up to 203 degrees Farenheit