SOS Mechanic Certification Practice Exam

Excessive negative camber refers to a situation where the top of the tire is tilted inward more than the bottom. This alignment can dramatically impact tire wear patterns because it causes more tire contact on one side during driving. When negative camber is overemphasized, it predominantly increases tire contact on the outer edge when the vehicle is in motion, particularly during cornering. As a result, the outer edge of the tire experiences much more friction and heat, leading to accelerated wear in that specific area. Over time, this uneven wear will likely result in the need for premature tire replacement, as the outer edge will become excessively worn compared to the inner tread.

In contrast, other choices may not accurately reflect the effects of excessive negative camber. For example, promoting even wear across the tire surface would typically be a characteristic of proper alignment, while extending tire lifespan contradicts the reality of accelerated wear due to misalignment. Additionally, reduced effective grip of the tire could occur with improper alignment, but it is not the most direct consequence of excessive negative camber compared to the wear pattern specifically.