Run-flat tires, initially introduced by BMW, are designed to stay on the rim in the case of a catastrophic blowout. These tires are self-sealing, incorporating a gel layer under the tread surface. In the event of a puncture, this gel instantly forms a seal around the debris that caused the puncture or hole. This is generally permanent. Identify run-flat tires by carefully inspecting the tires for specific markings.
Turn on the flashlight. Scan the sidewall of the tire.
Look for markings such as "ZP," "RFT," "SEAL" or an image of a flat tire with an arrow pointing away from it. Use the magnifying glass to pick out these indices, if necessary.
Inspect the rim area of the tire as many run-flat models have plastic, load-bearing slugs in lieu of a traditional rubber rim attached to the wheel.
