What effect does incorrect tyre pressure have?

Incorrect tyre pressure affects driving safety and tyre longevity in two main ways. First, it impairs driving stability because the tyres do not grip the road properly, which can lead to poor handling and increased risk of accidents. Second, incorrect pressure increases tyre wear, causing uneven or faster deterioration of the tyres, which means they need to be replaced sooner. The third option, extending reaction time, is not related to tyre pressure but rather to the driver's alertness and reaction ability. Therefore, maintaining correct tyre pressure is essential for safe and efficient driving.