Red Seal Automotive Service Technician Practice Exam

How does improper tire inflation affect handling?

1. It improves grip on the road

2. It creates a smoother ride

3. It can lead to decreased responsiveness

4. It has no effect on handling

The correct answer is: It can lead to decreased responsiveness

Improper tire inflation significantly impacts how a vehicle handles. When tires are either over-inflated or under-inflated, it can result in decreased responsiveness. This happens because the contact patch, or the area of the tire that makes contact with the road, becomes compromised. In the case of under-inflation, the sides of the tire may flex more than intended, leading to a vague steering feel and longer response times when turning. Conversely, over-inflation can cause the tire to be too rigid, reducing the tire's ability to conform to the road surface and diminishing its grip, which can also impair steering responsiveness. Maintaining proper tire pressure ensures optimal contact with the road, enhancing the vehicle's handling characteristics such as cornering stability, steering feedback, and overall responsiveness. Therefore, understanding the importance of proper tire inflation is crucial for safe driving and effective vehicle operation.