How are tire inflation levels checked during an inspection?

Using a tire pressure gauge to check tire inflation levels during an inspection is the standard method because it provides an accurate measurement of the air pressure within the tire. The gauge gives a specific reading that indicates whether the tire is inflated to the manufacturer's recommended level, which is crucial for safety, handling, and fuel efficiency. Properly inflated tires ensure optimal contact with the road, reducing the risk of blowouts and improving overall vehicle performance.

While visual inspections can help determine if a tire looks flat or has obvious issues, they do not provide a precise measure of air pressure. Other methods, such as using a penny to check tread depth, focus on a different aspect of tire health, and a digital dashboard display may only indicate if the pressure is low but may not provide a clear, actionable number. Hence, relying on a tire pressure gauge is essential for ensuring tires meet safety standards during an inspection.