The Michelin Pilot Sport 4 S 255/40zr18XL is a high performance summer tire designed for drivers of sports cars, coupes and sedans. It features an asymmetric tread pattern with an optimized contact patch for improved grip and handling, as well as a silica-infused compound for improved wet traction and reduced rolling resistance. It also has a reinforced sidewall for enhanced cornering stability and a responsive steering feel.