The ContiSportContact 5 ContiSeal is Continental's Max Performance Summer tire initially developed for Original Equipment use on Rolls-Royce Dawn, Ghost and Wraith ultra-luxury automobiles. Engineered to combine short braking distances, good cornering traction and top-speed capability with reduced fuel consumption and good treadwear, ContiSportContact 5 ContiSeal tires also provide the peace of mind that comes from knowing one's travels will not be delayed by typical tread area punctures. Designed to deliver self-sealing continuing mobility, ContiSportContact 5 ContiSeal tires feature a sticky, viscous coating on the inside of the tire that instantly seals nail or screw punctures up to five millimeters (approximately 3/16") in diameter. The ContiSeal coating is designed to permanently fill the path of the puncture when the object is removed.Like all summer tires, the ContiSportContact 5 ContiSeal is not intended to be serviced, stored nor driven in near- and below-freezing temperatures, through snow or on ice.The ContiSportContact 5 ContiSeal uses Continental's Black Chili compound molded into an asymmetric tread design that features a macro-block outboard shoulder that adapts to the road surface to improve road grip and cornering stability. Four circumferential grooves channel water to resist hydroplaning and enhance wet traction. A continuous center rib and notched intermediate ribs promote steering response and straight-line tracking. The ContiSportContact 5 ContiSeal's Black Chili compound's short-chain polymers react to braking forces by building heat to shorten braking distance on wet and dry roads, while the compound's long-chain polymers release the absorbed energy more efficiently at constant speeds to reduced rolling resistance. Thus, the tire stops faster and remains cooler for longer life and reduced fuel consumption.The tire's internal structure features twin steel belts reinforced with spirally wrapped polyamide (a mixture of heat-resistant synthetic aramid fiber and nylon threads) that enhances the ride quality while tuning the contact area's vertical flexibility and lateral rigidity.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. 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.