What does it mean when a tire is "under-inflated"?

When a tire is described as "under-inflated," it means that the air pressure within the tire is lower than the manufacturer's recommended levels. This condition can significantly affect both the performance and safety of the vehicle. Under-inflated tires can lead to increased rolling resistance, which can result in reduced fuel efficiency. Moreover, they tend to wear unevenly, which might lead to a shorter lifespan of the tire.

An under-inflated tire can also compromise vehicle handling, increasing the risk of loss of control. Additionally, it generates excess heat due to increased flexing of the tire sidewalls, which may lead to blowouts. Therefore, maintaining the correct air pressure is crucial for the safe operation of a vehicle and optimal tire performance.

The other options describe different conditions or issues that do not directly relate to tire inflation levels. Understanding tire pressure and its effects is fundamental for safe driving practices.