Which of the following checks is crucial for tire inspection?

Checking for tread or sidewall separation is a critical aspect of tire inspection because it directly impacts vehicle safety and performance. The tread of the tire is responsible for providing traction and handling under various road conditions, so any separation can lead to reduced grip and increased risk of hydroplaning or loss of control. Additionally, sidewall separation can compromise the tire's structural integrity, posing a significant hazard that may result in tire blowouts while driving.

Focusing on tread and sidewall condition helps identify wear patterns, damage, or other issues that could lead to tire failure, which is essential for maintaining safe vehicle operation. Regularly inspecting these areas can help ensure that the tires remain in good condition and function properly, contributing to overall road safety.