What is a common cause of tire fires?

Under-inflated tires can lead to tire fires because insufficient air pressure causes increased friction and heat generation as the tire rolls. When the tire is not properly inflated, it doesn't maintain its intended shape and may flex excessively, generating additional heat. If this heat builds up to a critical point, it can ignite the rubber materials of the tire, leading to a fire.

In general, maintaining correct tire pressure is crucial for safety and efficiency. Overheated brakes, excessive tread wear, and potholes can also contribute to tire issues indirectly, but under-inflation is a more direct cause of tire fires due to the way it affects heat buildup in the tire structure.