The Michelin Pilot Sport 4 S is a high performance tire designed for use on sports cars, luxury sedans, and performance SUVs. It features a unique tread pattern that provides excellent grip in dry and wet conditions, as well as superior cornering stability and handling. The tire also offers a comfortable ride, even at higher speeds. The 255/45ZR18XL size is designed for 18-inch wheels and offers a maximum load capacity of 1,521 pounds.