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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