Cold PSI raises fast when driving

[Tireman9]

A clarification might be of help. The pressure number molded on the sidewall of tires is NOT the "Maximum Allowable" pressure. It is the Cold pressure necessary to support the Maximum Load capacity for that tire. In reality the pressure number molded on the tire sidewall is the Minimum needed to provide for the support of that load.
Increasing the cold pressure above the number on the tire sidewall will NOT increase the tire rated load capacity.


If the pressure increase because of increased Ambient Temperature or because the tire gets hot from being in the Sunlight or the tire gets hot from being driven on, that increase is considered and accounted for by tire design engineers. The increase is about 2% for each increase of 10°F in tire temperature. Even a temperature increase of 100F ( 20°F to 120°F for example)would only result in about 20% increase in tire pressure and undamaged tires can tolerate a greater pressure increase than 20%.


Note I am not saying that you can heat a tire to above 190F and not have problems but those problems would be the result of high temperature degradation of the rubber and not simply due to pressure increase.

[rracer5]

Originally Posted by Davidg

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.

X2

Originally Posted by Flybob

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

X2

Originally Posted by Charles.maine

I am an idiot. Complete waste of a thread. So the tires had 106-108 in all 4, cold sitting in the garage. I don't know where I got the 80 from. Max is 110 and so them running hot around 110-115 is totally normal. Thanks for all the insight.