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Old 10-27-2010, 09:59 AM   #11 (permalink)
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If you want to go over the rated pressure that is a choice that you need to make on your own, you should not do it just because someone on here said it was safe or a good idea, the max pressure on your tires is what they have been tested to be safe at.
Some of us are willing to take personal risks and are willing to push beyond what has been tested to be safe and I don't think it is reasonable for any of us to tell you do to the same.

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Old 10-27-2010, 10:21 AM   #12 (permalink)
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Originally Posted by IsaacCarlson View Post
EDIT: I borrowed a friend's flat bed trailer a few months ago to haul the tractor. I checked the tires before leaving and my air gauge exploded in my hand!!!! It was an 80 lb gauge too. It had well over 150 lbs in the tires and they were wearing flat. He hauls VERY heavy loads on occasion, and so he leaves them "fully inflated". These tires are half worn down as they have seen many miles, but they are wearing flat.
What pressure were the tires rated at? My truck tires are rated at 65psi, but that doesn't mean you can run every tire at that pressure.
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Old 10-27-2010, 06:41 PM   #13 (permalink)
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Originally Posted by endurance View Post
What pressure were the tires rated at? My truck tires are rated at 65psi, but that doesn't mean you can run every tire at that pressure.
Radials yes you can, but would you really want to?

Your tires last longer, your fuel economy improves, but you likely will have more suspension wear and potential for impact blowouts and reduced handling or sometimes increased? I think its up to him where his priorities lie.

Last edited by rmay635703; 10-27-2010 at 07:09 PM..
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Old 10-27-2010, 11:07 PM   #14 (permalink)
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They are E range tires. I think they are rated at 80 psi. He keeps them at high pressure so he does not have to air them up. They ride like rocks when the trailer is empty. I air them down to about 50 when I use it and then let him air them up.

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Old 10-28-2010, 05:37 AM   #15 (permalink)
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i agree, mine are are rated at 35 p.s.i but i have them on 40, rides abit harder nut cornering is alot better, im in nz where the earthquakes are s0o you notice it as you go over the cracks and bumps in the road
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Old 10-28-2010, 11:35 AM   #16 (permalink)
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Ok thanks for the responses. My tires are the cheapest Kuhmo's GM can buy. I'm rate at 44psi I have them set to 50psi cold. There has been some change as for the harsh ride. Its not that bad I've driven on extreme low profile tires on 19" rims so its not that horrible. Thanks for the help.
2 cars one never gets driven the other is an MPG project already at 5% increase in standard driving economy CAI and Pulstar plus. Thinking weight reduction next year.
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Old 10-29-2010, 03:51 PM   #17 (permalink)
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exploding air gauge. Not a good thing. I'm running 5 psi over my recommended and will slightly increase later on.
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Old 10-30-2010, 08:12 AM   #18 (permalink)
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My max sidewall is 51psi and I keep mine at 60psi. Yes, the ride was a little rougher at first, but I quickly got used to it and don't really notice it anymore. I do notice the decrease in rolling resistance though. And you should always fill cold, at times when I fill hot, I'll just add 3-4 more psi than I normally would.

When I leave in the morning with the car cold, my TPMS will read 59-61psi for each tire and will slowly increase to 61-64 as the tires warm up.
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Old 12-03-2010, 11:04 PM   #19 (permalink)
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Overinflating tires is more dangerous than it is economical. The tiny reduction in rolling resistance is not worth the reduced safety margin caused by rock hard tires. Use the high end of the recommended pressure range marked on the tire and no more or risk a big reduction in braking and cornering traction. That's my .02
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Old 12-03-2010, 11:44 PM   #20 (permalink)
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The Civic had a set of mismatched junk 13s rated for 44psi, so I figured I'd bump em up to 50psi. If they wore bad, no problem, they were nearly worn out anyways. Got a noticeable reduction in rolling resistance but recently I discovered a 1/4" bulge in the tread, along with the sidewall peeling off the steel belt at the edge of tread patch. Still holds air but must have been minutes from blowing out. The other 3 tires look ok, so it is likely just old age. If you overinflate, I'd avoid doing it on old tires, and keep an eye on the tire condition.

hyperme, what tire brand/size is yours? 51psi sidewall?? I want a set of those...


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