Changes in Air Temp and Tire PSI
If airing up tires to 80 PSI (Manufacturer recommended Max cold pressure indicated on tire) while air temp is 45 degrees and then traveling to a warm climate, will I likely have to let some air out? W...
Forum Discussion
Gonzo42 wrote:
As a rule of thumb, air pressure in tires incraase about one psi for a temperature increase of 10 degrees F.
Tire pressure should be set when cold. That is such as first thing in the morning or when the tires have not been running for at least 3 hours. The settings specified assume an ambient temperature of about 72 deg F.
If the air temp you have is different, you can make a calculation such as: if ambient temperature is 52 deg F, reduce your pressure by 2 psi.
I concur. I had to study tires for Crash Reconstruction. Air them up cold to the sidewall amount. The tires are made so that when they warm up and the air pressure increases, it will be fine.
