Run-flat tires are also more expensive than their conventional counterparts — they often sell for $40 to $65 more than conventional tires — and they're not always repairable after a puncture.

Our grandparents would agree that they're a modern miracle: tires that keep on turning even when they're flat. But how exactly does a run flat tire work?

In comparison, typical tires will, of course, need repairing or replacing when flat. If you're wondering how run-flat tires work, there are two different types.

For a long time, it was common for vehicles to have a spare tire in case you get a flat. However, the industry has shifted in favor of going without them.

Photo Credit: Bridgestone. Flat tires and blowouts are almost inevitable; a situation that could prove disastrous— 612 people were killed in tire-related accidents in 2019 alone.

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