Can the front and rear tire pressures of a car be different? Why is the tire flat when the tire pressure is normal?

Tire pressure is very important for the safe driving of a car. Too high or too low tire pressure will affect the car's driving on the road, so the tire pressure is usually measured before driving. So, can the front and rear tire pressures of a car be different?

Can the front and rear tire pressures be different?

Generally, the tire pressure of a car can be controlled between 2.3 and 2.5, and the difference should not be too big. The tire pressure of an ordinary car is between 2.0 and 2.3 at the front and between 2.2 and 2.5 at the rear. Whether the front and rear tire pressures are adjusted to the standard tire pressure value or to be consistent with each other can be adjusted accordingly according to the number of passengers in the car.

Usually, the engine and gearbox of a family car are at the front, and the weight of the whole vehicle is at the front, so the standard tire pressure of the front and rear wheels of most ordinary family vehicles when cold is different. Generally, the front wheel pressure will be 0.1~0.2 bar higher than the rear wheel pressure.

If there are only one or two people in the car, you can add the standard tire pressure. If there are often many people in the car, you can increase the pressure by 0.1~0.2bar according to the standard, or adjust the front and rear tire pressures to the same.

Why does the tire look flat when the tire pressure is normal?

Different models have tire pressure values ​​marked by the manufacturer, and you can inflate according to the tire pressure value. If there is no tire pressure monitor, check the tire pressure once a month if the tire is not damaged. If it is normal, don't worry about it even if it looks low. In many cases, the visual low tire pressure is the result of uneven force on the four tires due to unbalanced parking positions, while the actual tire pressure has not changed.

Can you tell the tire pressure by eye?

It is still difficult to observe with the naked eye.

Nowadays, most cars use vacuum tires, and the air pressure reflected by them is not too much deviation, which is difficult to observe. A difference of 0.3 to 0.5 bar is already a lot.

If the car model does not have tire pressure monitoring, you can buy a tire pressure gauge and put it in the trunk. The tire pressure monitoring model will automatically reflect the tire pressure of the four wheels of the car to the driver at any time and anywhere, and the tire pressure gauge can also replace it. Measure the tire pressure of the car at regular intervals or before going on the highway.