What is the condition of tires when checking tire pressure?

Checking tire pressure when the tires are cool is essential for obtaining an accurate reading. When tires are warm, usually due to driving, the air inside them heats up and expands, which can lead to an inflated pressure reading. This can result in overinflation when compared to the manufacturer's recommended levels based on cold tire pressure.

Measuring pressure when tires are cool ensures that any pressure reading reflects the true state of the tire without the influence of heat. This practice helps to maintain proper tire pressure, ensuring optimal performance, safety, and fuel efficiency. Proper tire maintenance is critical for the vehicle's performance and can also prevent premature tire wear or blowouts, emphasizing the importance of performing tire pressure checks under the correct conditions.