Tire pressure fluctuation when hot

Old-Biscuit wrote:

locster wrote:
Thank you for the reassurance.

I expected them to increase once heated up, but not by that much. I've read somewhere to expect 1psi increase for every 10 degrees F change. Even my tire monitor sounded the alarm with these numbers. I had to manually override the threshold to shut it up, but was afraid that I shouldn't have ignored them.

Thanks for pointing out 1 psi per 10*F increase....that is the 'standard' on charts.

To increase 18 psi the temp would have had to change 180*F :H

:S:S:S

All tire 'monitors' indicated same 18 psi increase in ALL 6 tires....suspect tire monitoring system error.

YES-tire pressures will increase from COLD to HOT
But you are correct to suspect an 18PSI increase.

So did all 6 tires drop 18 psi when they returned to COLD temp??






TPMS are neat but I still prefer 'old school'
Digital Pressure Gauge (not old old school pencil gauge :B )