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Alfred622's avatar
Alfred622
Explorer
Aug 11, 2018

TPMS - Newbie worried about what it shows.... is it OK?

I just added a TPMS to the motorhome. I've inflated front tires to 85# and rear to 95# which is 5# over recommended inflation based on weight they carry. TPMS reads them cold as: Front: 8...
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wolfe10's avatar
wolfe10
Explorer
Aug 13, 2018
And, for both tire and wheel, the PSI is cold.

Cold is defined as at ambient temperature before driving, tire not in sun, etc.

Both tire and wheel manufacturers KNOW and take into consideration the PSI increase with temperature increase. After all the Ideal Gas Law has been known for a very long time and most tire/wheel engineers knew about it from high school chemistry/physics.

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