check tire pressure with MH on jacks?

[ChuckinKC]

I hope this is not a redundant post, but I have not seen this question before. I know you are to check the tire pressure cold. The best time for me to do this is before a trip with the coach in the driveway. I always have the coach on the jacks to keep it level with the slide out so that we can load easily. Will it make a difference to the tire pressure if the coach weight is resting on the tires, or if the weight is mainly on the jacks? Or is 80 PSI going to remain 80 PSI no matter what weight the tire is currently carrying? I have seen mechanics mount a tire and air it up off the car, then install the tire, so it would seem that it would NOT make a difference, but on the other hand, putting weight on the tire would seem to add pressure inside also. Any thoughts??

[Traveler52]

Tire pressure will not change what so ever with our with out the load taken off the tires.
Don't believe just try it.

[CharlieTwo]

It doesn't seem right but diveman is correct. You would think it would go up in pressure with the weight on.... but it doesn't.