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Is 40 PSI Good Tire Pressure

Is 40 PSI Good Tire Pressure? The Detailed Answer

What tire pressure is appropriate is always a very controversial topic in discussions. A tire that is too flat or inflated will not provide good driving performance.

Both will also lead to problems that endanger the driver’s safety and those around him.

40 is a reasonable level of pressure to maintain. In contrast, many others think this number is too high, and the pressure should only be at 30 PSI.

So is the recommended PSI for tires 30, 40, or something else? Let me find out the most accurate answer right in the article below.

Is 40 PSI Pressure Good Or Too High? 

Is 40 PSI Pressure Good

Tire type answers whether 40 PSI in car tires is the correct pressure level.

Each different tire model will have its structure and material. These factors will determine that the product will operate at what pressure is reasonable.

Average model pressure

Most car manufacturers and tire manufacturers offer recommendations between 32 and 40 PSI. Very few tire devices operate above or below these two marks. So, you need to immediately reconsider if the pressure in the tire rises above 40 PSI or drops below 32 PSI.


Heavy vehicles such as 7-seater SUVs, full-size pickup trucks, or cars require more pressure-filled tires.

The weight of the passengers or cargo will put more force on the tires.

In this case, you’ll need to add 4 to 8 PSI per component to push the total pressure up to 45. From there, it enhances your vehicle’s stability on the road.

Plus, some mini 4-seater models or 2-seater pickups also sometimes use tires with PSI levels only between 27 and 28. Of course, you can still pump more air inside because of the products. It still withstands up to 32 PSI.

What Happens If The Pressure Is Too Low Or Too High? 

It is hazardous to travel with tires with pressures different from the recommended tire pressure chart.

recommended tire pressure chart

Recommended Tire Pressure Chart

Whether higher or lower, we will still face many potential risks when operating a vehicle. In addition, your vehicle will not be able to maintain its long-term durability.

Too low

Traveling often with tires that are too low pressure also means that you are damaging these devices yourself. Because, in this case, the tire will slowly sink due to insufficient air to maintain the required shape. It makes the surface and sidewalls more in contact with the road surface. In the end, the tires will wear out much faster than expected.

In the worst case, the increased friction will also generate a lot of heat and melt the tire’s surface. And an explosion will readily occur if the hot steam comes into contact with the air inside.

Dimpled tires also make driving more difficult by reducing grip or responsiveness.

Too high

The tire will explode if you intentionally or unintentionally put too much pressure inside. When factors such as pressure, temperature, and durability all reach their limits, this accident is bound to happen.

Unlike a soft tire, a stretch will cause faster wear in the center section. The two side walls have moved quite far due to the air impact. But even so, you will also have difficulty operating the car without the support from these details. What is most noticeable is the drop in grip at high speeds.

Why Does The Pressure Change?

Why Does The Pressure Change

There are many different causes for changes in tire pressure. However, most of these factors are related to natural wear and tear, the environment, and damage.

Natural erosion

No tire model is immune to natural wear and tear. 

Even if you try to maintain the parameters according to the tire pressure chart by size, after a while, the product will gradually reduce the pressure. 

But luckily, this process only consumes about 1 or 2 PSI. The effect of natural wear on the tire is not significant.


The environment, especially the weather, is the leading cause of tire pressure fluctuations. The air inside is also a stable substance that must obey nature’s laws. 

If the weather cools, the air molecules will contract, causing a decrease in pressure. As it heats up, the air expands and puts more pressure on its rubber walls.


If the tire pressure drops suddenly, there is a high chance that the product has encountered damage that causes air to leak out. It would help if you took the tire to repair or replace it to continue moving.

How To Check The Tire Pressure?

How To Check The Tire Pressure

To avoid problems related to pressure, it is best to check this factor carefully before moving.

With the three steps below, you will quickly know whether the tire can still operate.

Tire cooling

The heat can cause the tire pressure to increase suddenly, thereby causing errors in the measurement process. Therefore, when starting the measurement process, you should cool the tires and avoid sunlight or other heat sources affecting the device.

Connect the gauge and start working

You must test pressure with measuring devices. So prepare a suitable gauge and connect the tire intake valve to manipulate. Ensure that the position where you plug the inlet is not open to avoid air loss.

Record the results

You can skip this step if you’re busy, but recording the results is essential. Comparing the pressure level through each ride with the tire pressure chart PSI will make it easy to monitor and evaluate the tire.

How To Maintain Proper Tire Pressure? 

How To Maintain Proper Tire Pressure

Here are some easy-to-implement but instrumental methods to help you maintain tire pressure.

Regularly check the pressure.

Check the air level in these components before the tire pressure indicator light flashes. Instead, actively look at this parameter after a period. 

Especially after long trips or to areas with unstable terrain, you should immediately check to avoid possible problems.

Review the recommended information

Most manufacturers have recommendations about the level of injection pressure and pressure to maintain stable tire operation. You need to monitor these parameters to avoid moving when the tire is over-inflated or under-inflated. Thereby minimizing wear during operation.

Do not ride on flat tires.

Trying to move when the tire is flat will only cause more severe damage than this part. In this case, you should look to quick patch methods or find the nearest store or garage to receive timely support.

Final Words

40 PSI tire pressure may not be suitable for some tires, but it is perfect for many other products. 

Therefore, you should read the knowledge carefully in today’s article to know the appropriate pressure parameters. From there, you can take appropriate actions when operating the vehicle.

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