Forum Discussion

anon125's avatar
anon125
Explorer
Mar 29, 2015

tire pressures

We just got michelin xze tires.
The tireman wanted to put the max air in them , 110psi I think.
But our experience is that hard tires rattle the mh on the bumpy main roads like the i5.
So we said 90 at the back and 80 in the front, where the plugs in the woodwork covering the screws round the old style tv keep shaking out.
Are those pressures okay?
Thanks all

15 Replies

  • j-d's avatar
    j-d
    Explorer II
    You gotta pick your Rim Size at the top of the Load/Pressure Chart. I selected 19.5" thinking that's what you have. I don't know if the chart will show that page in the link I'm sending or not.

    If you get stuck, go to a Truck Scale (like CAT, costs $10) and get Front and Rear Axle Weights. They'll be called Steer and Drive. If you have a Toad or Utility Trailer tow it onto the Scale and it'll show as Trailer.

    Post what you get, and if you can't get the chart to work, I'll look it up on my real computer and give you the pressures.

    1. "sidewalling" the pressure is rarely right.
    2. handling depends on proper front pressure
    3. you can use one manufacturer's chart for another's tires so long as all the specs match
    4. single and dual have different capacities so use the chart carefully
    5. some Michelin charts are for Corner Weights (which CAT won't give you) so you may have to double the chart values to compare with CAT weights.

    Willing to help. I'd need the exact nomenclature of the tires as well as the axle or corner weights. Let us know!
  • The tire link led to...Locate your tire size (16", 17", etc.).Click on that tire size in the box below.Match your tire's sidewall markings to the table with the same sidewall markings (LT215/85R16 LRE XPS RIB®, for example.)
    Sadly no box appeared, maybe because I use a tablet.
    Thanks all
  • phillyg wrote:
    Your PSI should be adjusted to the tire mfgrs. load range table. You can't know for sure without knowing the weight on each axle.


    X2. load up the MH as you would for travel. that should include fuel, food, water, LP, clothing, pets, supplies and people. take it to a certified scale and, at a minimum, get individual axle weights. then consult the inflation tables here and inflate accordingly. ideally you want the minimum inflation for the load being carried. you can inflate higher than the minimum but you shouldn't inflate lower than the minimum. a higher inflation may result in poorer handling and longer stopping distances. for sure you'll experience a harder ride. be sure to set the inflation on a cool day or before the tires heat up from the sun or from use.
  • Click here to view a document from Michelin that will explain in great detail how to determine the proper tire inflation for your specific tire and the specific weight of your RV.

    Hope this helps.
  • Your PSI should be adjusted to the tire mfgrs. load range table. You can't know for sure without knowing the weight on each axle.

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