Locate the valve stem on your tire. Twist off the cap, and you'll expose a metal pin. If you look at the back of the air pressure tool there is a small nipple that is for releasing air pressure. Use this, or a similar tool, to press down on the pin firmly.
For instance, if 35 psi is recommended, and the maximum safe pressure listed on your sidewall is 44 psi, you can safely put 38 or 40 psi in your tires. You can even go to 44 psi. You'll experience a harder ride, but you won't create a blowout danger. You may even experience sharper cornering and increased fuel economy.
Over-inflated tyres can create a harsher ride, increase the risk of a blowout and the likelihood of skidding. Over-inflated tyres tend to wear out prematurely in their centre. This can lead to: A smaller surface area of the tyre connecting with the road.
Recommended tire pressure
Based on normal tire sizes for each segment, small-sized car are usually 30 psi, medium-sized cars are 36 psi, and large cars are 42 psi. Keep in mind that warm tires normally exceed recommended cold tire pressures by 4-6 psi.
Most passenger cars' psi requirement will be between 30 to 35 psi, but several vehicles fall outside of that range and every vehicle will have specific requirements. Good tire air pressure ensures that tires wear evenly, provide a smooth ride, and increase fuel efficiency.
Specifically, the level of 40 psi can be suitable for passenger cars or sports cars. But this is too high for small cars with a recommendation below 35 psi, while 40 psi is too low for large trucks. The recommended level for the tires of famous sports cars and passenger cars is between 32 -40 psi.
40 psi (2.8 bar) sits at the highest end of what you'd consider normal tire pressure in hatchbacks, sedans, crossovers, small and mid-size SUVs, and sports cars.
Remove the valve cap from the stem on the tire to expose the metal pin. If you have an air pressure tool, the back is equipped with a small piece specifically designed for releasing air pressure. Press down firmly on the pin of the valve using this tool, or another similar item, to release air.
Ideal Tire Pressure
Tire pressure between 32 to 35 PSI is most suitable for most vehicles. However, one can go as low as 20 PSI (although that is not recommended). Anything below 20 PSI is considered a flat tire. PSI stands for Pounds per Square Inch.
Normal tire pressure is usually between 32~40 psi(pounds per square inch) when they are cold. So make sure you check your tire pressure after a long stay and usually, you can do it in the early morning.
Low tire pressure always is more dangerous than high tire pressure. When tires are deflated, more rubber touches the ground, the tires heat up and you're in danger of a blowout.
If your car is underinflated, then it is going to feel sluggish. Underinflation will also lower the fuel economy of your car and shorten the lifespan of a tire. Overinflating a tire will also shorten its lifespan. The car will also handle more poorly because less of the tire is in contact with the road.
As a general rule, the ideal tire pressure is between 30 and 35 PSI (pounds per square inch), but not all cars are alike.
Tires are overinflated during the shipping process, so as to help prevent the flat spot from forming in the tire as it sits for days on in during the shipping process. It is supposed to be part of the delivery check process that the service department deflates the tires to the proper pressure.
A lower tire pressure makes the tire softer, meaning a smoother ride. This is a technique used by some who feel their suspension is too harsh. By decreasing tire pressure, it compensates for stiff suspension slightly. Lower tire pressure increases the contact patch with the driving surface.
Show wear down the middle of the tread. Lose traction - because the shape of the tire actually becomes deformed by excessive air pressure, this decreases the tire's footprint on the road. More prone to damage - an over-inflated tire is stiffer and may not react as expected to common road hazards like potholes.
Proper tire pressure can vary from vehicle to vehicle, but for most makes and models the recommended tire pressure is between 30-35 PSI (pounds per square inch). Avoid over-inflating your tires to max pressure or beyond in order to prevent poor braking and decreased tire life.
Typically, slightly over inflating your tires won't cause serious negative effects. As long as you're only a few pound per square inch (PSI) over the manufacturer's recommended PSI, you should be fine.
In most of these cases, 40 psi should be more than enough, and since most modern tire designs will allow up to 44 psi (in some cases more) this is not a problem. If you have a heavily loaded vehicle, up to 44 or even higher is ok if the tire allows it, but this is a little high for most vehicles.
Tire pressure can decrease about 1 PSI (pounds per square inch) for every 10 degrees the temperature drops. It's not due to air escaping, but rather the air inside the tire condensing. Once it does that, it takes up less space inside the tire.
Fifty psi is a lot of pressure for a passenger-car tire. That number is on the sidewall because it's the tire's maximum allowable pressure. That means you can put up to 50 pounds of air in that tire without worrying about the tire exploding or deforming to the point where the car won't handle safely.
Tyres filled to their maximum psi become rigid making them more susceptible to damage from potholes or curbs. Excessive air pressure not only makes them more prone to premature wear and tear but can also deform the shape of the tyre. This results in reduced traction and poor grip thus causing the tyre to bulge.
Should Tire Pressure Be Higher Or Lower In Summer? Tire pressure should be higher in the summer. Driving with flat tires increases the danger of tire failure or damage, poor handling, and decreased fuel efficiency.
The 4psi rules states that “if your tyres are inflated correctly then the tyre pressure measured when the tyres are hot (after travel) will be 4psi greater than the pressure measured when they were cold (before travel)”.
The recommended psi for 4WD's on bitumen is around 30-35 psi. It is also good practice to read tyre pressure when the car has been at a stand still for around 3 hours, as when tyres get heat in them they tend to expand, and therefore alter the tyre pressure reading.