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Old 01-22-2008, 10:41 AM   #1
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Tire Pressure & How Much?

Hey Guys,

What is a good tire pressure for an SPI with AC and size 14 tires? I do mostly do (NY) city driving.

The side panel states 32 psi, I was told to add some air to the front tires to around 34 psi.

Any thoughts on this. Appreciate the feedback and thanks to all!


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Old 01-22-2008, 11:03 AM   #2
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a couple extra psi probably wont hurt anything the car would roll a little better and give you slightly better gas mileage but it really wouldnt matter. id just put in about wat the maximum psi is on the tire
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Old 01-22-2008, 11:19 AM   #3
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max psi on the tire = asking for trouble. DONT do this.

I run 31-32 on my 15" winters and 34-36 on my 16" summers. It really depends on the tire.
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Old 01-22-2008, 11:21 AM   #4
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Quote:
Originally Posted by s_montgomery View Post
a couple extra psi probably wont hurt anything the car would roll a little better and give you slightly better gas mileage but it really wouldnt matter. id just put in about wat the maximum psi is on the tire
there are so many people who do it and are begging for premature tire wear. it also decreases ride comfort. oh and it shouldnt be done. search for more reasons not to inflate your tires to or near the max psi.

35psi in the front and 32psi in the rear are usually a good combo.

Last edited by scrammer; 01-22-2008 at 04:43 PM.
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Old 01-22-2008, 04:22 PM   #5
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What do you mean running the max pressure is asking for trouble? If that was true, the tire manufacturers wouldn't put those numbers on the tire.
I run mine at the max all the time. As long as you set it when the tire is cold there is nothing wrong with doing that. I do it for fuel mileage reasons, and I don't suppose it helps that much, but it sure doesn't hurt anything. There are certain vehicles (some VW's for instance) that like to wear the rear tires funny if you run alot of pressure. The Focus isn't one of those cars though that I have ever seen do it......mine doesn't.
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Old 01-22-2008, 04:42 PM   #6
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You set the tire pressure at max when the tire is cold?
This means when the tire heats up and the air pressure increases in the tire, you are exceeding the MAX rating on the sidewall.
This is a max rating for the tire. The manufacturer put it there for a reason. The reason is; you go over that number and you are risking premature tire problems. The tread patch decreases thus decreasing traction.
With that much air in the tires, potholes are a worse threat. There is no room for the air to move about when the tire flexes. With the air pressure over the MAX rating, the tire is apt to explode. This is no joke.

Tire inflation pressure is the level of air in the tire that provides it with load-carrying capacity and affects the overall performance of the vehicle. The tire inflation pressure is a number that indicates the amount of air pressure– measured in pounds per square inch (psi)–a tire requires to be properly inflated.

Manufacturers of passenger vehicles and light trucks determine this number based on the vehicle's design load limit, that is, the greatest amount of weight a vehicle can safely carry and the vehicle's tire size.The proper tire pressure for your vehicle is referred to as the "recommended cold inflation pressure." (As you will read below, it is difficult to obtain the recommended tire pressure if your tires are not cold.)

Because tires are designed to be used on more than one type of vehicle, tire manufacturers list the "maximum permissible inflation pressure" on the tire sidewall. This number is the greatest amount of air pressure that should ever be put in the tire under normal driving conditions.

We dont carry trailers and thus no need to inflate the tires to that extent.

Does your sidewall read "Maximum" or "Recommended"? I know the answer already. Believe me on this one, putting the max rated amount of air in your tires is the wrong thing to do. the numbers on the inside of the fuel door are there for a reason.

but hey, what do i know.
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Old 01-22-2008, 04:49 PM   #7
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I would usually put an extra 5 psi in if i'm going on a long freeway drive for mpg reasons. Otherwise I go for what it says on the label. I've had no problems yet.
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Old 01-22-2008, 04:54 PM   #8
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the vw's you have seen have sloppy or worn-out suspensions. this is creating toe or positive camber. this is why they will wear on the inside quicker.
dont compare v-dubs to Foci.
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Old 01-22-2008, 04:56 PM   #9
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^^^^nicely Said SCRAMMER!!!!
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Old 01-22-2008, 05:46 PM   #10
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i run 33-35psi all the way around, i take a look at the wheels as the car sits to see if the rubber squats down any if it doesnt i leave it at that psi. now with the cold weather and snow im running 40psi.
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