Optimal Tire PSI When Running

CapriRacer wrote:
As a general rule, you want the pressure buildup to be less than 10% of the starting pressure. If you exceed 15%, you should take immediate action - typically adding pressure. Between 10% and 15% you need to consider what possible future action should be taken, but you don't need to react immediately. (But don't put off the decision for more than a few days of operation.)

So in your example, your 53 psi starting point could go as high as 58 or 59 before your should be concerned. If you add 4 psi because of the difference in ambient, then the pressure could be as high as 63 psi. So it sounds like you are OK.

Thank you, CapriRacer, I was hoping you would respond. I had to read your response 5 times before this non-engineer's mind could perhaps comprehend what you were saying. :)

Let me see if I got it right. After deducting the increase in psi due to increased ambient air temperature, the remaining psi increase should be within 10% of the starting psi, 15% tops. If over that, it is due to too much tire flex, so add air pressure to reduce tire flex and thereby reduce heat and accompanying psi increase due to tire flex.

Hope you will confirm or straighten me out on my layman's interpretation!

Thanks again,

Bruce