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      02-23-2010, 08:57 AM   #1
disruptv
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Those w/20s...what air pressure are you running?

I have oem 18s now and am upgrading to aftermarket 20s...I'm going to run 255/30/20 and 285/30/20 if it matters on 20X9 and 20X10.5...

I was curious what air pressure everyone here runs on their 20s as I want the wheels 2 be properly inflated....is there a formula to calculate the proper air pressure when you go +2?

Thanks everyone

p.s. max psi is 51psi in the tires
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      02-23-2010, 10:59 PM   #2
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      02-26-2010, 11:26 PM   #3
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What is the offset of your wheels? You might want to check your rear tires.

I have 20x10 et20 and with 285/30/20 I rubbed on bumps as well as when I have passengers in the back. 285/30/20 is too tall for what it is. I know 3 other enthusiast who ran in the same situation bc the tire that is thrown around is all wrong. You should be running 285/25/20 to get the rub free solution. Some vendors that suggest 285/30/20 and they are wrong, I listened to one of the main vendors here and it was a mistake I did bc it was a headache. I end up running 275/30/20 and the rubbing was all gone.

Most people run from 35-38 psi when cold all around.
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      02-27-2010, 02:57 AM   #4
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I run 38psi on my pirelli p-zero nero's.
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      02-27-2010, 07:39 AM   #5
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I'd run 34-35 front, 37-38 rear unless you got INVO's then I'd go higher.
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      02-27-2010, 10:33 AM   #6
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Quote:
Originally Posted by MrHarris View Post
I'd run 34-35 front, 37-38 rear unless you got INVO's then I'd go higher.
Why higher on the INVO's?
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      02-27-2010, 11:38 AM   #7
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INVOs have a soft sidewall so people raise the psi so it doesn't bend their wheels when they hit a pothole or so.
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      02-27-2010, 09:20 PM   #8
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thanks 4 the heads up everyone
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      02-28-2010, 06:31 AM   #9
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Quote:
Originally Posted by PunjabiM3 View Post
Why higher on the INVO's?
Also at highway speeds the steering response is terrible and feels very unstable. Raising the pressures help this, but at the expense of slight reduction of ride comfort.
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