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Tyre Pressure

Tyre Pressure Guide

Tyre Pressure refers to the measure of how much air is in your tyres.

It is crucial to both your tyre and vehicle's wellbeing as it is the air that carries much of your car's load as well as the tyre itself. Tyres need to be filled with the correct amount of air to move and stop your vehicle.

Tyre Pressure is measured in relation to pounds per square inch ("psi"), and each tyre should have the right amount of air within for it to run efficiently.

It's the responsibility of every driver to maintain the correct tyre pressure levels. You can have your tyres checked at the nearest petrol station for free or have it done by yourself at home using a handy, personal use, electronic tyre pressure gauge.

Of course, we put in our best efforts to schedule inspections regularly

However, due to our busy lifestyles, we seldom forget and end up not paying attention to our tyres.

Riding on tyres with the wrong tyre pressure is highly dangerous when out on the road. You put not only your own life at risk but also that of your passenger's and other pedestrians and motorists on the road.

Incorrect Tyre Pressure

Wrong tyre pressure measurement can result in loss of fuel-efficiency and affect your car's stability as well as braking capabilities.

Deflection

Tyre Deflection is a critical tyre condition where your tyre becomes deformed and protrudes at its contact patch, its sidewalls of the tyre or the part that has constant contact with the road. The primary cause fo this is the unusual amount of tyre pressure in your tyres.

When tyre pressure is high

Having too much air in your tyres will cause the tyre pressure to shoot up, thereby making your tyres suffer from feeble traction and grip.

It will cause your car to slide, glide, slip, and bounce all around the road while the brakes will not be as responsive and immediate.

Compromised grip and traction pose a severe disaster, especially when driving on a crowded highway at high speeds.

When tyre pressure is too low

When the pressure is too low, more of the tyre's tread and surface wears out on the road as your tyre will virtually be running flat.

More of the tyre flattens out due to excessive deflection, creating a rather off-shaped contact patch.

An increasing contact patch increases the friction between the open road and the rolling tyre, making the tyre surface to heat up. 

Excessive heat will eventually alter the tyre, resulting in faster tread wear. 

Lowered tyre pressure usually causes blowouts too since it can cause significant damage to the inside surface of the tyre. 

What causes wrong tyre pressure? 

  1. Things like vehicle impacts, tyre flexing and distortion can diminish a tyre's air pressure.
  2. Excessive pressure in your tyres is also associated with a case of too-much compressed air loaded into the tyre at the vehicle service or petrol station. 
  3. In contrast, low tyre pressure can be attributed to different reasons. The valve might break, small holes on the tread can leak air out, and this happens naturally over time. Tyres gradually but certainly lose pressure every day through a process termed 'permeation'.
  4. Variation in altitudes and seasonal changes also create a surge or decline in tyre air pressure.
    1. Overall, tyres lose up to one or two kilopascals of air per month in cold weather and even more in warmer weather. You need to regulate your tyre pressure by about 1 - 2 psi for every 10 degrees of temperature change.
  5. Ignoring the load capabilities of 4WDs and trucks is another factor that can cause inappropriate tyre pressure. Since they are frequently and variably loaded, their proper inflation pressure is determined by actual tyre loads, and that requires weighing your vehicle.

Benefits of Correct Tyre Pressure

There are notable advantages to maintaining the correct air pressure in your tyres: you save on fuel, your tyres last longer, your car's performance is heightened, and auto accidents are prevented.

How frequent should you examine your tyres air pressure?

On average, you should check the pressure of your tyres twice a month.

Also, we recommended you have your tyre pressure examined prior to a long ride and when your tyres are cold rather than right after a long drive.

Checking the tyres immediately after a drive will give you an inaccurate reading.

Schedule Routine tyre air top-ups

It is likely smart to begin thinking of refilling your tyres with air like you do your petrol tank with fuel. The recommended interval between top-ups and proper notice is every second time you fill up at the tank.

Different pressure levels

Lots of vehicles typically have diverse optimum tyre pressure measurements for the back and front tyres, so do not forget to have this adjustment made or maintained. 

Furthermore, it would be best if you had the pressure in your spare checked as well. The space-saver type spare needs a higher air pressure level, and it would be a hassle to find out the tyre pressure is low on the day you need it.

How much air does my tyre need?

The vehicle owner's manual contains the correct air pressure. Each car also bears a label or placard built-in often placed on the driver's side door panel that states the tyres right and suggested inflation pressures. At times, this sticker or label is also indicated in the glove box or below the fuel cap. The tag will appear similar to the image below.

The label informs you of the tyre size, the cold tyre pressures, maximum vehicle load recommended by the vehicle manufacturer. Another resource you will also find helpful is the tyre load rating guide.

The responsibility of maintaining one's correct tyre pressure lies on every driver. It indeed determines survival in life-threatening driving situations.

 

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