Edmunds estimates that 15% of new vehicles come with run flats, especially models from luxury retailers such as Mercedes-Benz, BMW and Cadillac. When the tire is punctured, the sealant releases automatically to fill the hole and prevent air leakage.ĭue to their safety benefits, many new vehicles now come equipped with self-supporting run flat tires. These tires have an extra lining beneath the tread with a puncture sealant solution. These tires are typically found on heavy-duty and military vehicles.Ī separate but similar tire category is the self-sealing tire. This type of tire has a ring of hard rubber (or other material) around the rim that supports the vehicle’s weight if there is low/no air pressure. This allows you to drive for a limited distance at a limited speed (ex: up to 50 miles at 50 mph), so you can get to the nearest tire repair shop or pull off to a safe area to put on your spare.Īnother type of run flat design is a support-ring run flat tire.
This tire is made with heat-resistant rubber and has a reinforced sidewall that supports your vehicle’s weight if the tire loses air pressure.
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