The Pilot Sport PS2 ZP (Zero Pressure) is Michelin's Max Performance Summer run-flat tire developed for selected performance sedans and sports cars. Initially introduced as Original Equipment (O.E.) on BMW 3 series sport package cars, the Pilot Sport PS2 ZP has recently expanded its O.E. applications to include Michelin's first Corvette fitment on the highest performing production supercar in Chevrolet's history, the 2009 Corvette ZR1. The Pilot Sport PS2 ZP is designed to combine world class dry road traction, handling and cornering, however it is not intended to be driven in near-freezing temperatures, through snow or on ice.The Pilot Sport PS2 ZP molds an advanced tread rubber compound into an asymmetric tread design featuring Michelin's Variable Contact Patch to keep more tread rubber on the road during a variety of maneuvers. The tread design features large outboard shoulder blocks and continuous intermediate and center ribs to provide a solid connection to the ground for control during cornering, braking and acceleration in dry conditions. The tread design also features wide circumferential grooves and lateral notches that help channel water through the footprint to enhance wet road traction. The tire's internal structure includes two steel cord belts that are further reinforced by size-optimized, spirally wound polyamide to improve steering response and resistance to distortion while enhancing ride quality and high-speed durability. Pilot Sport PS2 ZP tires incorporate Michelin's newest generation of run-flat technology including a heavy-duty rayon casing reinforced by rubber zero pressure sidewall inserts.