How to check car tire pressure correctly
(Baonghean.vn) - Car tires need to have the correct standard pressure; if the tire is too soft or too tight, it will cause unsafety. Therefore, it is necessary to have the correct awareness of the standard pressure level, especially in the summer, to ensure the safe operation of the vehicle.
Manufacturer recommended tire pressure
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Information about the car's tire pressure recommended by the manufacturer is usually found in the car's owner's manual or on a decal affixed to the car's door/door sill. This number is usually expressed in PSI, KPa or Bar and is usually the maximum allowable pressure.
Each vehicle has a different recommended pressure level, so users should rely on the parameters provided by the manufacturer to inflate the tires.
1 PSI (Pound per square inch) = 6.895 KPa. In which, 1 KPa = 1,000 Pa = 1,000 kg/cm2. In which, 1 KPa = 0.01 Bar; PSI, KPa or Bar are common tire pressure measurement units on user manuals or pressure gauges.
For most small sedans, MPVs, or pickups, the standard tire pressure is usually 27 - 32 PSI. Some car models use special tires that can have a tire pressure of up to 40 PSI.
Check the pressure printed on the sidewall of the car tire.
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This is especially important when buying a used car. Because the car tires may have been replaced, not the standard tires of the car manufacturer. And there are many car tire manufacturers, so it is necessary to check the pressure specifications printed on the car tire sidewall.
The pressure listed on the sidewall of your tire is the maximum pressure your tire can handle. Please note that this is not the optimal pressure for operation.
Pressure is marked on the door sill
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The pressure shown on the door sill is the pressure recommended by the manufacturer. The actual pressure of the tire needs to be compensated for the pressure due to the weight of the goods/occupants in the vehicle. Normally, if the recommended pressure is reduced by 10 - 15%, it will be a reasonable pressure level.
It should be noted that the tire pressure recommended by the manufacturer is the pressure when the tire is cold - when the vehicle has been stopped for a long time, the tire surface is not hot.
Adjust tire pressure according to the season
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Usually, long-time car users often use their eyes to judge the pressure level. But that is difficult to be accurate. Because the trend of car tires is getting thinner, using the naked eye to judge the car tire pressure is very difficult.
Furthermore, in the summer, the temperature is high, the air expands more than usual, so at this time it is necessary to inflate the tire a little less than ideal to ensure that when the tire heats up, the tire pressure does not exceed the tolerance of the tire wall.
Conversely, in winter, the tire pressure should be inflated just enough so that when the tire heats up, the internal pressure is still at the ideal state.
When to check car tire pressure
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To ensure safety, you should check your tire pressure every time you fill up your tank or every 30 days. Or when the temperature changes suddenly, you should also check your tire pressure to adjust it to suit the actual situation.
In addition, even if the car is not moving and the tires are new, the pressure will decrease by about 0.7 PSI/month. Therefore, if the car is not used for a long time, we should also check and increase/decrease the tire pressure accordingly.
