Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which wear pattern is associated with over-inflation?

When a tire is over-inflated, the tire’s contact patch becomes smaller and more centered on the tread. That concentrates load in the middle, so the center of the tread wears faster while the edges carry less contact and wear more slowly. So you see wear right in the center. In contrast, under-inflation causes the shoulders to wear first, properly inflated tires tend to wear evenly across the tread, and edge wear often points to other issues like misalignment or unusual pressures.

When a tire is over-inflated, the tire’s contact patch becomes smaller and more centered on the tread. That concentrates load in the middle, so the center of the tread wears faster while the edges carry less contact and wear more slowly. So you see wear right in the center. In contrast, under-inflation causes the shoulders to wear first, properly inflated tires tend to wear evenly across the tread, and edge wear often points to other issues like misalignment or unusual pressures.