How to judge that automobile tires need to be inflated?

If you use a tire pressure gauge in the range of 2.2 to 2.6, you don't need to pump up. The first two rounds are generally 2.2, and the last two rounds are 2.5.

The normal tire pressure range is 2.2-2.6bar. As long as the tire pressure is detected within this range, even if the tire looks a little flat, there is no need to continue to inflate, because the tire is normal at this time, and continuing to inflate may make the tire pressure too high, causing safety hazards.

Precautions:

The standard tire pressure is marked on or near the driver's door. This standard value can also be found on the fuel tank cover and in the manual. It should be noted that there are different standard units of air pressure, generally there are 3~4 kinds. Just as there are kilograms and kilograms in weight, there are 3~4 kinds of marking units on the barometer.

The owner doesn't care how to calculate this, just look at where the pointer on the barometer points, what unit is used to mark this position, and then look at the standard value of the air pressure unit corresponding to the vehicle. See the difference between the measured value and the standard value. If it is too high, let out some air; If it is too low, replenish air until the tire pressure matches the standard pressure.