The Pilot Sport A/S 3+ (Plus) ZP (Zero Pressure) is an Ultra High Performance All-Season run-flat tire member of Michelin's Pilot family of low profile, high-speed tires developed for the drivers of high-end sports cars, sporty coupes and sedans looking for total performance combined with temporary continued mobility after a puncture has allowed a complete loss of air pressure. The Pilot Sport A/S 3+ ZP tire is designed to provide Michelin's highest level of ultra-high all-season performance, emphasizing dry road handling and wet road grip with balanced all-season traction for occasional light snow. Pilot Sport A/S 3+ ZP tires feature Michelin's Helio+ Technology, which utilizes sunflower oil and Extreme Silica Technology in the tread compound to increase traction at low temperatures and on wet roads. Molded into an aggressive asymmetric tread pattern inspired by the Michelin Pilot Super Sport, its 4-, 5- or 6-rib designs* are tuned to complement tire width and feature more rubber and rigid blocks on their outboard shoulders to provide high levels of lateral grip that offer as much dry cornering capability as some competitors' summer performance tires. Wide circumferential grooves help resist hydroplaning, enhance wet traction and help generate some of the shortest wet braking distances in the Ultra High Performance All-Season category.Variable Contact Patch 3.0 technology derived from Michelin's experience in endurance racing focuses on evenly spreading contact patch pressures and temperatures. The tire's internal structure includes two high-tensile, lightweight steel cord belts reinforced with spirally wrapped polyamide cord to combine predictable handling and high-speed durability with treadwear and ride comfort, and the reinforced sidewall inserts are designed to temporarily support the weight of the vehicle, even after a loss of air pressure. *Tread design rib counts are identified on the tire's Specs tab.