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  #1  
Old 01-29-2011, 03:17 PM
CLOS99 CLOS99 is offline
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Question Tires PSI ?

ok so wondering what happens it you put more air in the tires.. im running on 30 psi but the 2 front tires look to flat. if i put 35 to 40 psi on the tires what happens.?
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  #2  
Old 01-29-2011, 03:42 PM
darkstar_420 darkstar_420 is offline
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Default Re: Tires PSI ?

if you put too much in itll ride like crap and wear the centers of the tires out, 30-35 should be alright for the front, about 32 should be good in the rear
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Old 01-29-2011, 05:05 PM
L454S L454S is offline
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Default Re: Tires PSI ?

You have to read the small print on the tire sidewalls. It will say max cold pressure and be either 35 or 44 PSI. Whichever it is put just under that(33 or 42). Your tires will last much longer and get better mileage.
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Old 01-29-2011, 06:13 PM
westtntrucker westtntrucker is offline
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Default Re: Tires PSI ?

What I do is find a level piece of concrete/asphalt that is pretty smooth. Get several sheets of white paper. Look at your sidewall, it will say something like 36 psi cold at 1560 lbs.
That is the max load limit of the tire at a set psi. So, if I run both fronts at 36psi I can put 3120 lbs up front. That'll never happen.
So to find what my tires will hold weight wise at a certain psi. I roll over a blank sheet. If there is too much sidewall I increase psi. If there is a narrower tread than the tire, I decrease psi. I Adjust till the tread is full and the sidewall is just starting to show on paper.

This is not advise on how you should run your tire pressure. You should inflate to recommended pressures in your owners Manuel. I'm just telling y'all what I do and should not be followed. Just sayin'
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Old 01-29-2011, 06:33 PM
darkstar_420 darkstar_420 is offline
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Default Re: Tires PSI ?

Quote:
Originally Posted by L454S View Post
You have to read the small print on the tire sidewalls. It will say max cold pressure and be either 35 or 44 PSI. Whichever it is put just under that(33 or 42). Your tires will last much longer and get better mileage.
incorrect, lots of people think this but it is not true, those are your max inflations 42 psi in the rear of even a 1 ton will wear the centers of the tires out
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Old 01-29-2011, 11:45 PM
L454S L454S is offline
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Default Re: Tires PSI ?

Darkstar, where does your info come from? In most cases, we are talking passenger car/ light truck type tires like what you have pictured in your avatar, correct?
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Old 01-30-2011, 10:11 AM
darkstar_420 darkstar_420 is offline
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Default Re: Tires PSI ?

im a tire man LOL i took courses

----------

i run 28 psi in the rear of my truck and 34 in the front, and im getting awesome wear, when i had 295s on the rear of my truck i had to lower them down to 16-18 psi to get decent wear
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Old 01-31-2011, 12:55 AM
L454S L454S is offline
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Default Re: Tires PSI ?

Good info, and I don't doubt you. After 20+ yrs doing front end and alignment work at dealers, my observations are a bit different. We would get bulletins regularly from OE tire mfgs. when problems arise(Goodyear, Michelin, etc). Most of the problems are for premature wear(inside and outside tread wear, cupping) etc. Every one of them recommends to inflate to max cold PSI or close to it.

Have done it this way for many years with great even treadwear results.

Could it be that the newer WIDE lower profile tires are a lot more sensitive to what we are talking about? Been out of the business for about 5 yrs.
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  #9  
Old 01-31-2011, 02:38 AM
TerrenceStuart TerrenceStuart is offline
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Default Re: Tires PSI ?

I Just run all 4 of mine at 35 psi. Had the tires since June 2005, with 44,000 miles on them and mechanics are always amazed, because as one put it: "44,000 miles? shit, that tread looks like it only has about 20,000 miles on it"
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Old 01-31-2011, 07:03 AM
darkstar_420 darkstar_420 is offline
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Default Re: Tires PSI ?

goodyears are just shit period, they always wear like shit, they do not get good milage anymore
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