Michelin Pilot Sport 4S (PS4S)Strengths Motorsports DNA: Developed with insight from Michelins extensive endurance racing heritage Including Le Mans. This tire brings proven race technology to the street. Collaborative Development: Chosen by some of the most elite automakersFerrari, Porsche, Mercedes AMG, and moreas factory equipment for their performance vehicles. Dual Compound Tread Technology: Outer Shoulder: Hybrid elastomers enhance dry grip for superior cornering stability