What is optimal pressure in car's tires?

Answer 1

Yes, you should look at the side of your tires to look for the maximum pressure. I would imagine that your dealership would provide you with suitable tires for the make and model of your car (god forbid they have no brain and give you inadequate tires, unless they want to be sued - but you can check your owner's manual to ensure you have the right kind on your vehicle.) Like most people have said it varies from tire to tire, however one point that should be mentioned is that as you drive, the pressure in your tire increases due to the energy transfer from your brakes to the tire (which in turn increases the kinetic motion of the air particles in your tire, causing it to expand; you can try this out - measure the tire pressure of your car in the morning before you drive it, then after you drive it for a little while take the pressure again and you'll notice an increase in tire pressure.) It's best to inflate your tire to about 5-10 PSI below the recommended gauge pressure so that when you do drive, you don't "over exert" your tire which would lead to damage on your tires. This idea applies especially in the summer when it's hotter outside. In the winter, you should pay close attention to the air pressure in your tires, because colder temperatures will lower the pressure in your tires.. if the tire pressure is too low, you risk damaging your tire as well - so it's best to check them out more often then (perhaps once a week in as opposed to maybe once a month in the summer.) Not only will this help with your tire's life, but it will also improve the safety of your car.

Answer 2

Optimal means Highest expected performance. So when the tires are at the set pressure (usually your tires say what their pressure should be, or the car manual does). It just a way of saying "the tire pressure is at its manufacturer's suggested pressure level". And when its there, It is expected to perform at its best!

Answer 3

Depends on the tire, and the car it's installed on. Either the car or the tire will come with a label stating what pressure the tires should be inflated to. That information should also appear in the owner's manual.

Answer 4

There are two recommendations - one from the car mfr and the other from the tire mfr.

Consider each side's motivations:

The car mfr makes tradeoffs between performance, handling and comfort - for comfort, they give pressure recommendations a bit lower than the tire mfr limits. Since the car mfr does not provide any warranty on tires, they can use lower pressures - it won't cost them a dime if your tires don't meet the warranted treadwear limit. And underinflation is one of the fastest ways to reduce a tire's life.

The tire mfr test their all of their tires in a lab at high and low temperatures for performance, safety, loading, traction and wear characteristics. They set the the maximum pressure to meet all those conditions, and mold the spec limits into the tires' sidewall. They want to sell a lot of tires - both OEM and into the replacement market, and they don't want a lot of warranty claims.

People pay a lot of attention to price and treadwear. Keeping the tire pressure equal to or just below the tire mfr's max. pressure will help you get the highest treadwear mileage, as well as fuel mileage.

I trust tire mfrs more than most car mfrs.

Answer 5

Tire sixes are different. However, most companies suggest 32-35 psi (pounds per square inch) The right sixe tire for your car is noted in your owners manual with the proper tire pressure. When tires get hotter they gain pressure with the heat. You will hear in racing that thedriver's will ask for tire pressure adjustments after the car tires are warm. However,follow the owners manual till you get to the track. See you at Darlington.

Answer 6

Most makers say to keep it at 26 to 28 psi, but this is geared more toward driver comfort than safety. This is what did in Ford and Firestone with the Explorer. Always keep them at 32 psi COLD (before driving any distance longer than 1 mile). This assumes that your max pressure is 35 psi (check the tire sidewall). You will sacrifice a little more in ride quality but the tires will be safer and last longer. If you have to add air after driving, put in up to 36 psi (no more than that). Recheck pressure about once a month.

Answer 7

It depends on the tires and the vehicle. For example, the recommended PSI for the stock tires on a F-250 superduty will be 65-75 PSI. On a Ford Focus, 60 PSI will be dangerous (and uncomfortable).

Read the owner's manual and look inside the fuel door for the recommended pressure for the stock tires.

Answer 8

Depends on what car you are driving and what surface you are driving on. Muddy roads will require a lower PSI while paved roads need to be better filled.

On a paved surface, the tyre must not balge until only the center part is touching the ground. It must also not be under inflated until one gets ware on the outsides of the tyre only. ie if your tyre sits like U or W then it is either over or under inflation while LI is perfect. in pressure terms, most cars will do well around 28-35psi

Answer 9

This information is determined by the make and model as well as the usage, so check your owners manual which often tell you to look in either the drivers door jam or on the underside of the trunk lid. Call the people you got those tires from if non of the above are available.

Answer 10

It should say it right on the tire that's currently on the car. Mine are 44psi, but I have a spare tire that is only 38psi. Both sizes are drivable on my car. But as others said possibly check the manual to find what exactically is considered the best.