Red Seal Transport Trailer Technician Practice Exam

What is the effect of under-inflated tires on trailer performance?

1. Increased tire longevity and improved fuel efficiency

2. Decreased fuel efficiency and increased risk of blowouts

3. No effect at all on performance

4. Better handling and stability

The correct answer is: Decreased fuel efficiency and increased risk of blowouts

Under-inflated tires can significantly impact trailer performance, primarily leading to decreased fuel efficiency and an increased risk of blowouts. When tires are under-inflated, they have a larger contact area with the road, which increases rolling resistance. This greater rolling resistance requires more effort from the engine to maintain speed, thus consuming more fuel overall. Additionally, under-inflated tires generate excess heat due to the increased flexing of the sidewalls during rotation. This overheating can lead to structural failures, such as blowouts, which not only compromise safety but can also result in significant damage to the trailer and potential accidents. In contrast, adequately inflated tires help maintain optimal performance, ensuring better fuel efficiency, safer handling, and reduced wear over time. Given these factors, the effect of under-inflated tires on trailer performance is notably detrimental, highlighting the importance of regular tire maintenance and correct inflation levels.