The Michelin Pilot Sport 4 S 255/30ZR20XL is a high-performance summer tire designed for sports cars, coupes, and sedans. It features a unique tread pattern that helps provide excellent grip on dry and wet surfaces, while the advanced tread compound helps to ensure long-lasting performance. The tire also features a reinforced sidewall for enhanced cornering stability and improved steering response. It is rated for speeds up to 186 mph and has an H speed rating.