The Michelin Pilot Sport 4 S 225/40zr18xl is an ultra-high performance summer tire designed for sports cars, coupes, and sedans. It features a unique tread pattern with wide circumferential grooves that provide excellent water evacuation and wet traction. The tire also has a silica-infused tread compound that enhances grip in wet and dry conditions, and a reinforced sidewall that provides excellent cornering stability and responsiveness.