What part of the tire is inspected for irregular wear patterns?

The tread surface of a tire is critically examined for irregular wear patterns because these patterns can indicate various issues with the vehicle or the tires themselves. An uneven tread wear can be a sign of problems such as improper alignment, unbalanced tires, or issues with the suspension. These irregularities can affect the vehicle's handling, safety, and performance.

By inspecting the tread surface, technicians can identify specific wear patterns that suggest what corrective measures may be necessary, such as rotating the tires, checking alignment, or addressing suspension problems. This inspection is essential for ensuring optimal tire performance and extending the overall lifespan of the tires.

The other areas of the tire, such as the sidewall, valve stem, and bead area, while important for overall tire health, do not specifically indicate the same range of wear-related issues as the tread surface does. The tread is where the majority of the tire's interaction with the road occurs, making it the focal point for assessing wear and performance.