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Old 06-13-2016, 08:16 AM   #1
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Cold PSI raises fast when driving

So I have read over and over and over that you set the cold psi to the max. I have Goodyear G614s with max PSI of 80. After about an hour or so of driving the temps are about 10-15 degrees above the outside air temp. My concern is the PSI shoots up to 105-115. Is this something to worry about?
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Old 06-13-2016, 09:03 AM   #2
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I've been wondering about this also.
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Old 06-13-2016, 09:10 AM   #3
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The pressure should not climb that much. 5-10 psi max should be about all you should see.


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Old 06-13-2016, 09:15 AM   #4
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When the tire mfg sets the cold pressure they understand that the pressure will climb and the max cold pressure accounts for this. Your 20* temp climb does not seem to be normal there may be other factors involved. Speed, weight, alignment etc.
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Old 06-13-2016, 09:33 AM   #5
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This may be a question for wtire a real tire expert. But I know when I set up my tire pressure monitoring system they said to set the high pressure alarm point at 20% above the normal cold tire set pressure. So if you set your tire to 80 PSI cold that would be 96 degrees F for the high pressure alarm point. So your increase to 105-120 PSI would set off the high pressure alarm. Sorry but I do not have a fix for you here.
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Old 06-13-2016, 09:33 AM   #6
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First off do you have TPMS on the trailer tires?


If so how accurate are the sensors; IE what is the tolerance range on them?


What is your background for determining that the tire pressure is too high when the tire has heated up do to rolling resistance!


Have you weighed the trailer and the individual tire to determine the weights to see if one tire is overloaded or the trailer?
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Old 06-13-2016, 09:36 AM   #7
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Quote:
Originally Posted by Charles.maine View Post
So I have read over and over and over that you set the cold psi to the max. I have Goodyear G614s with max PSI of 80. After about an hour or so of driving the temps are about 10-15 degrees above the outside air temp. My concern is the PSI shoots up to 105-115. Is this something to worry about?
I agree that a temp increase of only 10 to 15F should not result in pressure increase of 30 to 45 psi. Something is wrong.

What brand TPMS?
Have you confirmed TPMS pressure against a known accurate digital hand gauge?
What are your measured tire loads?
What speeds were involved?

I only see about 8 - 10 psi with 10 to 15F at 63 mph. Of course I have at least 20% margin on load.
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Old 06-13-2016, 09:45 AM   #8
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Quote:
Originally Posted by Charles.maine View Post
So I have read over and over and over that you set the cold psi to the max. I have Goodyear G614s with max PSI of 80. After about an hour or so of driving the temps are about 10-15 degrees above the outside air temp. My concern is the PSI shoots up to 105-115. Is this something to worry about?
Isnt the max pressure in the G614, 110 psi? For the size of your fiver, 80 psi may be way to low which would cause over heating which results in pressures rising disproportionately. If you start out with 110 psi, the tire will run cooler.
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Old 06-13-2016, 09:52 AM   #9
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I will double check the information when I get home and report back.
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Old 06-13-2016, 10:01 AM   #10
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Per Goodyear site.
Size
LT235/85R16 Capacity 3,750 LBS @ 110 PSI
Ply Rating 14
Service Description 126/123 L
Diameter 30.7" Width 9.5"
Tread Depth 12/32
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