People with TPMS..

[Gsport]

Those that have tire pressure monitor systems, if you air up to max, say 80psi or in my case 110psi. on a cold tire, On a trip how much of an increase can I expect in tire pressure after driving all day??

[huntr70]

Depends on the ambient temperature....

On average, I gain about 8-10 psi when I am aired to 95 lbs.

[Steve and Cill]

I have noticed on ours that what ever side of the camper the sun is shinning on, when driving, the pressure and temps will be higher also. When stopped for fuel and setting on hot pavement, the heat will make the pressure and temp rise, but will go down once you start moving and the tires cool down. Just a couple of things I've noticed with ours.

Steve

[Dave and Monica]

The biggest change I've seen in tire pressure had everything to do with the change in ambient temperature. When we set off for our trip to WV in early May, the temperature was about 35^oF and the tires were 77 psi. By the time we hit WV 10 hours later, the ambient temperature was 95^oF and the tire high pressure alarms set at 95 psi were going off. You wouldn't normally see that much of a swing in ambient temperature and tire pressure increase that I've seen is more 10 - 12 psi.

Dave

[Gsport]

Thanks for the replys everyone. On this trip, the first with the new tires set at 110 they went up by 13 psi, and I was kinda worried that that was too much

[mtpocket]

Mine go 10 -15 psi higher. The temp has gone to 115 on the sunny side of a 90 degree day.

[TucsonJim]

I've put on about 7,500 miles, and I've driven mine in both cool and very hot climates. I've noticed about a 10-12 PSI increase, not matter the ambient temperature.

[RGMutchler]

The pressure in your tires will increase 2% for every 10 degrees Fahrenheit increase. For a max cold pressure 80 PSI tire that is 1.6 PSI for every 10 degrees. Your pressure will be effected by not only a rise or fall in ambient air temperature but also by the heat the tire develops due to friction and flexing going down the road. I have yet to find a tire manufacturer that will state a maximum pressure and a maximum temperature that their tires are designed to withstand.