The Michelin Pilot Sport A/S 4 225/45ZR18XL is a performance all-season tire designed for sport coupes and sedans. It features an asymmetric tread design with a solid center rib for improved steering response and high-speed stability. The tire also has large, independent tread blocks for enhanced cornering grip and a circumferential groove for improved wet traction. It also has an optimized rubber compound for improved tread life and fuel efficiency.