TPMS / TST507 Questions
I just picked up & installed a TST 507 TPMS. For others that have that system, I have a couple questions: - How much do the tire pressure readings move around? It seems like they generally chan...
Forum Discussion
RambleOnNW wrote:
We have the TST system, flow-throughs on the rear and non-flow-throughs on the front. During the summer I can count on the pressure increasing on the rears by about 12psi from the cool of the morning to the heat of the highway. The sensors read 2-3psi low when cool but they match the reading of my digital tire gauge when hot.
Ambient temperature increase of 10 degrees F will cause a pressure increase of 1 psi. The other pressure increase is due to tire heating from flexing while rolling, and also heating from rolling on hot pavement.
Sorry the 1 psi for 10F may be close for passenger tires but the better figure to use is 2% for 10F change.
