For example, a set of four Pirelli P Zero Run Flat tires for a 2022 BMW 3 Series can cost $1,270.40, according to TireRack. A set of non-run flats for the same car, like four Michelin Primacy Tour ...

Self-healing tires promise to help mitigate the dangers and frustrations associated with getting a flat tire, but do they actually work?

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.

You could always choose an option that’s becoming increasingly common from OEMs, which is to use non-run-flat tires and just carry a tire repair kit, which is basically a can of Fix-A-Flat.

Contrary to popular belief, run flat tires (RFT) were first developed by Michelin during the 1930s, but they would go on to be offered as standard on our everyday cars nearly seven decades later.

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.

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?