The Michelin Pilot Sport 4 S is a high-performance summer tire designed for sports cars, coupes, and sedans. It features an asymmetric tread design that combines wet and dry traction with responsive handling. The tire has a 255/40zr21xl size, which is suitable for 21-inch wheels. It has an impressive tread life of up to 50,000 miles, and it is backed by a 60,000-mile warranty.