Michelin Pilot Sport 4 S ND0 – 325/30 ZR21 (108Y) XL TL is an Ultra High Performance summer tyre engineered to meet Porsche original-equipment requirements for high-powered electric and performance vehicles. It features an advanced asymmetric tread pattern with wide circumferential grooves that ensure rapid water evacuation and consistent wet-road braking performance. A dual-compound tread layout delivers maximum dry grip on the outer shoulder while maintaining dependable wet traction on the inner tread area. Michelin’s Dynamic Response belt technology provides precise steering feedback and a stable contact patch under extreme speed, torque, and cornering loads. The reinforced XL construction supports very high axle loads, while the ND0 homologation confirms full compatibility with Porsche chassis tuning, suspension geometry, and electronic stability systems.