Manitoba Class 3 Drivers Licence Practice Test

The best time to check tire pressure is when the tires are cold. This is because driving causes the tires to heat up, increasing the pressure and giving an inaccurate reading. Waiting for the tires to cool down will provide a more accurate reading of the tire pressure. Checking tire pressure immediately after adding fuel may also give an incorrect reading due to the changes in temperature caused by the fueling process. Additionally, checking tire pressure after a long drive may not give an accurate reading as the tires may still be warm and have higher pressure.