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Old 07-08-2007, 10:30 PM   #1
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Default Correct Tire Pressure?

I have the Perrelli P Zero Nero tires on my ssei. The max pressure rating on the tire is around 52 lbs (I forget the exact rating). The rating on the inside of the car door is much much less (around 32 lbs). I just got the car back from the local tire center where I had an oil change and tire rotation. I asked them to check the air pressure of all tires and adjust accordingly. I got the car back and they had the front tires at 36 lbs and the rear at 32 lbs. I usually keep the air pressure of these tires closer to the rating on the tires.What is the appropriate amount of air for these tires?
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Old 07-08-2007, 11:12 PM   #2
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the max tire pressure is for safety you never run your car at those pressure (i do at the track but that differend) 36 and 32 look ok to me that more the recommended pressure
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Old 07-09-2007, 12:04 AM   #3
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Boy does this bring back memories (both personal and tire blowouts from a few years ago...if you recall). I typically keep tires a few psi under rated pressure (have an excellent gauge...Milton S921) and ALWAYS got the car back from the tire dealer at the door rated tire pressure. After a few times, I was rather perturbed and questioned them (figuring they're experts). The response was:
For normal use, you'll get a better ride using tire pressure as rated on the door. And yes, increasing it somewhat should improve fuel economy. If you're carrying along a lot of weight (no idea how much that is), then you may want to up the pressure somewhat (certainly NEVER beyond rated pressure). Winter driving? Rather warm to think about this.

I don't claim to be a tire expert.
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Old 07-09-2007, 06:40 AM   #4
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Default Re: Correct Tire Pressure?

Quote:
Originally Posted by malatu
What is the appropriate amount of air for these tires?
The recommended inflation pressure on the driver door placard is what you go by. It doesn't matter what brand of tire, or maximum pressure rating on a tire. Cold inflation pressure should be 30-32 psi.
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Old 07-09-2007, 09:22 AM   #5
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Default Re: Correct Tire Pressure?

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Originally Posted by markwb
Quote:
Originally Posted by malatu
What is the appropriate amount of air for these tires?
The recommended inflation pressure on the driver door placard is what you go by. It doesn't matter what brand of tire, or maximum pressure rating on a tire. Cold inflation pressure should be 30-32 psi.
exactly.

the rating on the tire is the MAX rating for the TIRE and has nothing to do with how much pressure you should be running.

You can go ahead and overinflate the tires (over the door stickers spec) and you may have positive or negative handling changes, however, you will likely be increasing tire wear by doing so
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