Michelin Pilot Sport 4 S 225/40ZR18 is an ultra-high performance summer tire designed to provide maximum grip and responsiveness in dry and wet conditions. It features an asymmetric tread pattern with a larger outside shoulder to enhance cornering stability and reduce aquaplaning. Its silica-based tread compound helps to reduce rolling resistance and improve fuel economy. The tire also features a reinforced sidewall to reduce the risk of punctures.