The ADVAN ENVIGO ZPS (Zero Pressure System) from Yokohama is an All-Season, High Performance run-flat radial tire, designed to meet the continuous driving needs of drivers of sedans, sport cars and coupes. If there is a puncture or blow out of tires, the ADVAN Envigor ZPS has the capability of providing short-term mobility at 50 mph up to a distance 50 miles. The tire delivers a combination of good performance, comfort, long tread life and year round traction even on roads covered in light snow. Features of the AVAN Envigor ZPS radial tire includes: All-season silica tread compound molded into an enhanced contact area containing a five-rib directional pattern, which combines performance with year round traction; Connected shoulder blocks and a center rib that increase tread stiffness to enhance handling and straight-line tracking; Free intermediate blocks, slanting grooves and 3D sipes improve wet traction, hydroplaning resistance and help traction on light snow-covered roads; Matching steel belts on the inside strengthened by nylon covered belts and spirally wound belt edge strips to offer extended reliability under tough conditions while reducing tire weight and encourage constant ride quality; Two cord body plies covered by rayon that provide predictable handling, whereas the reinforced Yokohama’s ZPS sidewall provide temporary support of the vehicle’s weight even if the tire has suffered complete air loss after a puncture. NOTE: ZPS tires from Yokohama are recommended only for vehicles originally prepared with independent run-flat tires and a tire pressure monitoring system.