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goufgators's avatar
goufgators
Explorer
May 06, 2015

Finally...

I finally got around to having the MH weighed. I was not able to get 4-coners weighed but was able to weigh front and real axles. The front weighed 6620 therefore I assume half (3310) would be the weight for each front wheel. The rear axle weighed 12220 there for each of the four wheels one-fourth that amount or 3640. Now, the Goodyear Tire Inflation chart for 245/70R/19.5 tires begins with 80 psi for weights of 3640 single and 3415 dual. My weights as stated above are less that the minimum weights shown for 80 psi. Based on this, it seems logical that I could be able to run with 80 psi or, preferable, 85 psi and be well within the Goodyear range. Am I correct?
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  • Ductape's avatar
    Ductape
    Explorer
    May 06, 2015
    Yes, you are correct. Some people will advise to run a few psi extra if you don't know side to side weight. Personally I run 80# all around and monitor tire temps to see if there is any uneven loading. Generally the passenger side runs a few degrees warmer, but not enough to make me want to run higher air pressure on that side.
  • rk911's avatar
    rk911
    Explorer
    May 06, 2015
    goufgators wrote:
    I finally got around to having the MH weighed. I was not able to get 4-coners weighed but was able to weigh front and real axles. The front weighed 6620 therefore I assume half (3310) would be the weight for each front wheel. The rear axle weighed 12220 there for each of the four wheels one-fourth that amount or 3640. Now, the Goodyear Tire Inflation chart for 245/70R/19.5 tires begins with 80 psi for weights of 3640 single and 3415 dual. My weights as stated above are less that the minimum weights shown for 80 psi. Based on this, it seems logical that I could be able to run with 80 psi or, preferable, 85 psi and be well within the Goodyear range. Am I correct?


    correct. do not inflate to less than 80-psi but if you want to add 5-psi that's your call.
  • Effy's avatar
    Effy
    Explorer II
    May 06, 2015
    Yours sounds close to mine. I run 80 on all 6. Based on the weight chart I could probably run a few psi less but I doubt a few psi would make any difference in softening the ride so I err on the side of caution.
  • Bill_Satellite's avatar
    Bill_Satellite
    Explorer II
    May 06, 2015
    Keep in mind that your actual individual wheel weights will very likely NOT be half the axle weight. They often vary by several hundred pounds and you need both tires inflated to the pressure required to carry the heaviest wheel weight. That's why the 4 corner weighing is so important. However, if you add the additional pounds that would cover the possible mismatch you will do perfectly well.
  • dan-nickie's avatar
    dan-nickie
    Explorer
    May 06, 2015
    I would add a little to compensate for uneven load.
    85-90 psi.

    Then see how it rides/handles.
  • Mr_Mark1's avatar
    Mr_Mark1
    Explorer
    May 07, 2015
    Bill.Satellite wrote:
    Keep in mind that your actual individual wheel weights will very likely NOT be half the axle weight. They often vary by several hundred pounds and you need both tires inflated to the pressure required to carry the heaviest wheel weight. That's why the 4 corner weighing is so important. However, if you add the additional pounds that would cover the possible mismatch you will do perfectly well.


    Good advice here. I had our previous motorhome weighed four corners. The passenger side weighed 2,000 lbs. more (40,039 lbs. total).

    Front and rear weighing is better than nothing but try to get four corners for piece of mind.

    Safe travels!
    MM.

    PS. Bill, good to see you are still out there!
  • nevadanick's avatar
    nevadanick
    Explorer
    May 07, 2015
    Also higher pressure for higher speeds. On our SUV it says to add 4psi for speeds above 100. My personal truck and work truck both have sensors and higher speeds always raise tire pressures, but then stabilize. I cant imagine it would be any different on motorhome.

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