The Michelin Pilot Sport 4 S 225/50zr18xl is an ultra-high performance summer tire designed for sports cars, performance sedans, and luxury coupes. It offers superior handling and cornering capabilities, as well as excellent wet and dry traction. The tire also features a unique tread pattern and advanced silica-based compound for enhanced grip and stability. It has a tread wear rating of 400, meaning it should last up to 40,000 miles.