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
Cold inflation pressure refers to ambient temperature at the time you are driving not the cool of the morning. An added factor is highways with sun shining on them adds additional heating. I usually inflate my rear duals to around 76-77 psi in the morning to target a cold inflation pressure of 80 psi at drive time and that produces a hot driving temperature of 88 psi as read out by the TPMS monitor. Pressure rise is around 1.5 psi for 10 degrees F.
