The Ultrac Pro is Vredestein's Max Performance Summer tire purpose-built for drivers of sports cars, coupes, and luxury vehicles looking for high speed thrills and precise handling in both dry and wet environments. The Ultrac Pro, like all Max Performance Summer tires, is not intended to be serviced, stored nor driven in near- and below-freezing temperatures, through snow or on ice.Utilizing a high-silica tread compound designed for traction and speed and molded into an asymmetric pattern, the Ultrac Pro blends performance with comfort. The sidewall design features a special flexible zone built to cushion the ride alongside adjustments to the tire's contour and AI-sequenced tread pitch to reduce noise so drivers can focus on a smooth journey. Taking advantage of both a low-void outboard shoulder and angled tread blocks that are designed to minimize deformation in cornering, the Ultrac Pro is made for hanging on through turns. On the inboard side, the wide, circumferential grooves flow water straight through the contact patch to fight hydroplaning and maintain performance. Engineered to be stylish outside, with a unique "Chrono" sidewall design, and performance focused inside, the Ultrac Pro features a two-ply, rayon casing for strength and durability. Twin wide, steel belts join the nylon reinforcement ply for lightweight, yet dependable performance at the highest echelons of speed. The Ultrac Pro features dedicated all-wheel and rear-axle variations, with the all-wheel version focused on precise steering using a lower belt angle compared to the lower void ratio and wider belt angle on the rear-axle design.Note: Tires exposed to temperatures of 20 degrees F (-7 degrees C) or lower must be permitted to gradually return to temperatures of at least 40 degrees F (5 degrees C) for at least 24 hours before they are flexed in any manner, such as by adjusting inflation pressures, mounting them on wheels, or using them to support, roll or drive a vehicle. Flexing of the specialized rubber compounds used in Max Performance Summer tires during cold-weather use can result in irreversible compound cracking. While compound cracking is not a warrantable condition because it occurs as the result of improper use or storage, tires exhibiting compound cracking must be replaced.