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Jeffreykell12's avatar
Jeffreykell12
Explorer
Dec 29, 2017

Identify and correct tire pressure

Hello everyone, I’m trying to identify the correct tire pressure for like 39 foot class a RV. The tires have a listing on the side of them That says 110 psi, When I look inside the coach the wall where the specifications are shows 100 pounds of tire pressure. Currently they range between 70 and 85psi actual pressure. does anyone have experience with this? I really want to get it right.

Thank you
Class A

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  • WAFlowers's avatar
    WAFlowers
    Explorer
    Dec 29, 2017
    First load the coach then have it weighed. At a minimum you want the axle weights. Ideally you want the corner weights (weight on each tire). Next go to the website for the make/model of your tire and lookup the pressure rating for that weight.

    There is no single "correct" pressure. With the types of tires used on a Class A it is weight dependent.

    Worst case use the max axle loading and pump them up accordingly. The ride will be harsh but you will not be under-inflated for your load.
  • bobkatmsu's avatar
    bobkatmsu
    Explorer
    Dec 29, 2017
    The most accurate way is to weigh all four corners of your RV when it is fully loaded. Then go to your tire manufacturer web site and they will have a chart giving you the proper tire pressure based on the weight of your RV.

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