What is the proper tire pressure?

Question

My tires say max pressure at 44psi. Is that what there supposed to be set at or something different. Is the best time to check them when there cold?

Answer 1

Yes check them when they are cold.
You'll find the proper air pressure for your vehicle on a tag that is located on the drivers door. Look along the edge where the door lock mechanism is located. Typically it is a white colored tag with front and rear air pressure ratings.


U.P.

Answer 2

Wow, you must be confused? Half of your answers are correct and the other half say that 44 is right.
While I agree with the people that the information is on the vehicle placard. Usually found inside the driver's door jamb. It will give you the pressures for front, rear, and sometimes spare. Depending in what kind of spare the vehicle has the pressure could be much higher than the other tires.

There is a reason that the tire has a maximum tire pressure on it, and a reason why that may or may not be the same as the vehicle specifies it requires. A certain model of tire may be used on many different vehicles of different weights. The enormous difference in weight possibilities will give the tire different characteristics when driven. If a 1000 pound car and a 6000 pound car both ran the same tires at the same pressure... you can understand where this is going.The forces exerted on th tire would be quite different and your ride quality would also be different. This explains why each vehicle would have a recommended tire pressure. There are also many more ratings of a tire that we are not discussing.
The short answer is to forget what the tire says and do what the vehicle asks for.

One other way that I have found as an optimum way to create the best road to rubber ratio is to use a little time and a chalk bag. I've used this in lifted 4WD trucks and on my muscle car to get the best ratio of rubber to the ground when I am running tires that were not equivalant to the factory equipment.

You air up your tires and take a chalk bag (panty hose with powdered chalk works) and pat the tread of your tire with it. You then roll the vehicle forward a few feet to see where the chalk has rubbed off. You would then drop one PSI of air from each tire tested, re-chalk, and continue the whole process until you find the exact (or closest to the pound) tire pressure that gives your specific tire/vehicle combination the most rubber on the ground when loaded with a certain weight. You may not want to get this into it and if that's the case I would recommed that you air the tires up to what your vehicle placard states is correct.

Also, you should check them after driving a few miles. We recommend 8-12 to make sure the tires are warm. You can have a vairance of a couple of pounds. This is not of dire importance. Just know that the air will expand and the pressure will increase as the tire heats up.

Ultimately it depends on what you are trying to do as to what pressure is best for your purposes. You would want them very low if you were trying to get maximum traction, especially in a drag race or rock crawling condition. However, I have ran my tires up at about 80 PSI to keep the beads from breaking when I was trying to learn to drive a car on two wheels. (never perfected that, by the way) Neither of these would be worth a damn going down the road at highway speeds but everythig has it's purpose.

Hopefully everything said here was understood. I'm not sure if I successfully exlpained the logic behind different pressures for different vehicles and the process of checking them to optimize ground contact with the tire in a the short bit that I worte but I hope it did give you a better understanding if not a good understanding of your issue.

Answer 3

You are correct, always check tire pressure when cold not after you have driven. The car should sit for an hour or so to get a correct reading. This will give the tire time to cool off. The tire pressure you want is what is printed on the tire (they made it so they know what pressure it needs to handle and wear the best and will be the safest. Some vehicles used to (and still may) have a tire pressure printed on the drivers door edge. This is the pressure required for the particular brand and size tires that were installed at the factory. If that has been changed the proper inflation pressure may be different. Always go by the TIRE and not the sticker on the door. This is a common mistake and could cause tire failure (blowout). Also it is a good idea to check tire pressure AT LEAST once a month if not more often. Especially when the seasons change as this will change the pressure in the tire.

Answer 4

Yeah, ol' Clint is confused. If you have a 1000 lb car w/ tire pressure 44 psi, then the pressure exerted on the tire is 44 psi. Whereas if you have a 6000 lb car with tire pressure 44 psi, then the force exerted on the tires is .... wait for it.... 44 psi!

However, you should go with the recommended inflation on the door panel. The rating on the tire is the max for the tire. The rating on the car (35 I think someone said) is correct for your type of car, steering and suspension.

Short answer: always use the door panel, never the tire sidewall.

Answer 5

I pay attention and spot this plenty with reference to the tire pressures and what to run, the door sticky label is great for the unique tire for the motor vehicle and in case you bypass lower back with the unique tires the motor vehicle got here with then the door pressures ought to artwork. on your case you went with a after industry tire so your new stress greater advantageous than in all probability would be distinctive, so which you will would desire to attempt distinctive pressures relying on employing conduct to get the overall performance, tire placed on, and/or gas monetary device. the different individual is optimal with reference to the hp tires having a sticky compound and it having a greater physically powerful rolling resitance meaning greater friction with the line = much less mileage. Your inflation stress of 40 5 does appear as if a solid beginning factor.

Answer 6

Check and inflate when cold as air expands when hot. Inflate in accordance with the door plate inside the drivers door frame or on the end of the door or from the instructions in your owners manual. The maximum printed on the tire is the most it will hold before the danger it will pop. Do not use this number as it is dangerous and causes excessive tire wear. Use the door plate as it has the correct number.

Answer 7

Yes you should always check the pressure when the tires are cold. For maximum tire life you should go with the pressure stated on the side-wall of the tire. Your vehicle should have a label somewhere on it (usually in the dorr-jamb area) with recommended pressures for maximum ride comfort you could go with that but it's not designed for max tire life.

Answer 8

Each car has a different pressure requirement. The best place to find this inflation pressure is on the car's placard. The placard is a small sticker contains key information about the vehicle, including the correct tire pressure for the front and rear tires. Mine is in the driver side front door. In most vehicles, the owner's manual will direct you to the vehicle information placard's location.

Manufacturers locate them in many different places.
Some of the most common places to look for the vehicle information placard:
Driver side front door
Driver side rear door
Driver side "B" pillar (post closest to door hinge)
Passenger side "B" pillar
Passenger side front door
Passenger side back door
Driver side "C" pillar (post closest to the door handle)
Passenger side "C" pillar
Fuel filler door
Trunk/hatch area
Glove box
Centre console
Sun visor

Answer 9

44 psi is correct.
You could go down to as low as 40 psi.
Always put what it says on the tire, not what's written on the door tag.

Answer 10

35 PSI - Both front & Back and spare. ( In the trunk,, not what you are carrying around).. Ha, Haa, Haa...