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Old 10-22-2018, 04:57 PM   #1
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Join Date: Mar 2017
Location: Marquette Michigan.
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How do I calculate tire pressure - axle weights?

Is there a chart on line that I can use to calculate tire pressures for my Michelin tires on the motorhome. We don’t have a four wheel scale here, but was able to get both axels weighed.

Thank you! Ron.

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Old 10-22-2018, 05:02 PM   #2
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Old 10-23-2018, 08:43 AM   #3
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Here's the formulas:

Front axle weight/2 X 1.05 = Weight to look up in single wheel chart. Add 5 psi for your final inflation pressure.

Rear axle weight/2 x1.05 = Weight to look up in dual wheel chart. Add 5 psi for final pressure.

The 1.05 is used to estimate side to side weight differences that you will see when you do individual wheel weights.

And finally, do not inflate a tire less that 80% of the max side wall pressure.
Roger & Mary
2017 Winnebago Navion 24V
2014 Tiffin Phaeton 36GH (Sold)
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tire pressure, weight

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