The P Zero Run Flat is a Max Performance Summer self-supporting run-flat tire developed for the drivers of sports cars, sports coupes and high performance luxury sedans looking to combine the know-how derived from 100 years of Pirelli motorsport experience with the convenience of temporary extended mobility in the event of complete air pressure loss. Used as Original Equipment on Mini Cooper S and BMW 7 Series sedans, the P Zero Run Flat lineup includes selected additional replacement tire sizes for other vehicles. Pirelli’s warranty does not cover tires that develop compound cracking due to use in ambient temperatures below 45° Fahrenheit (7° Celsius), so the P Zero Run Flat, like all summer tires, is not intended to be driven in near-freezing temperatures, through snow or on ice.
P Zero Run Flat tires feature a special silica and carbon black tread compound that proves competent during the first few miles of driving when the tire is still cold, as well as provides consistent performance throughout the tire’s life. The tread compound is molded into Pirelli’s S-treme asymmetric design in which the location and width of the circumferential and lateral grooves minimize deformation to blend responsive handling, hydroplaning resistance and wet traction with dry road performance, even wear and acoustic comfort. Special nano-composites in the compound beneath the tread protect the casing from deterioration and merge sport handling with ride comfort. The tire’s internal structure includes twin steel belts reinforced by polyamide cord plies and an integration of nylon and aramid cord that controls tire profile deformation and stabilizes the tread area to enhance high-speed capability and handling.
Sidewalls feature additional reinforcements to provide self-supporting run-flat capabilities of 50 mph for 50 miles (80 km/h for 80 km). Due to these restrictions, it’s imperative drivers be notified when a loss in tire pressure occurs and requires the vehicle be equipped with a tire pressure monitoring system (TPMS) to detect and signal tire pressure changes.
Though they cannot be labeled as run-flat tires, tires branded with MOExtended or MOE on their sidewalls offer run-flat-like characteristics by delivering limited temporary extended mobility after a puncture results in complete loss of air pressure. Because MOExtended or MOE tires do not have the same speed and distance endurance of conventional run-flat tires, they should not be substituted in any situation where a conventional run-flat tire is required. To confirm what your vehicle needs, check our Original Equipment tire listing for your year, make and model or see your vehicle owner’s manual.
Founder at Tiresout. Used to be working as an engineer at Bridgestone Tires Akron Technical Center. The responsibilities included but were not limited to technical computing, indoor & outdoor testing of new tires.