Quote:
Originally Posted by Gkri
Yes, pressure changes with temp. (PV=NRT). I don't trust the TPMS sensors for accurate pressure but for pressure and temperature trends. I use a round, bourdon tube type gauge for accurate pressure readings on truck and trailer and adjust about 4 times per year, but do check before each trip.
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OK, last trip after I pumped them up, using a handheld digital gauge, the TPMS read 65lbs on all four, as well when I started out.
I did nothing to them, and I don't recall if I took a reading on each tire first, this last trip....
I do know the first time the outside temperature was about 15 degrees warmer at that time, which I'm guessing means I hit 65lbs sooner than if it was say 50 degrees outside, yes?