The AVID ENVigor ZPS (Zero Pressure System) is Yokohama's High Performance All-Season run-flat radial developed to meet the year-round driving needs of sports car, coupe and sedan drivers. With the ability to provide temporary extended mobility for a distance of up to 50 miles at 50 mph in the event a puncture allows complete air pressure loss, AVID ENVigor ZPS tires are designed to combine performance, comfort and treadlife along with year-round traction, even on light snow-covered roads.