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Old 02-02-2013, 02:23 PM   #1
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Tire Pressure Help

Ok,based on advise here,i had our 2013 Adventurer weighed yesterday. The front axle was 6,880 and the rear axle was 12,640 lbs. The tires are michelin 235/80R 225. I have looked at the michelin tire chart and am haveing difficulty reading the chart. Could someone please help. On the coach door Winneabago recomends 90lbs fron and rear. Thanks
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Old 02-02-2013, 02:40 PM   #2
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Chart says for front 70 PSI but until you get a 4 corner weight. It will be best to run 75 PSI.

For rear chart says 70 PSI but run 75 PSI until you get a 4 corner weight.
After 4 corner weight use chart for the highest side PSI and put same in the other side.

You can use 90 PSI when you add enough weight for the front to be 8,280 lb and rear 15,060
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Old 02-02-2013, 03:27 PM   #3
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Thanks Triker. I guess I should improve my handling and ride with this info
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Old 02-02-2013, 03:55 PM   #4
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For safety sake, I would stick to the 90 psi on the coach's door as recommended by Winnebago.
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Old 02-02-2013, 04:12 PM   #5
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The question of 75 psi and 90 psi depends on how the motorhome was configured when it was weighed by the OP. Hopefully the motorhome when weighed had a full tank of fuel, a full water tank and propane tank and food and supplies, and clothing that you would take on a trip. In other words it was fully loaded and ready to go on a vacation. If not then you should fill and load everything up and weigh it again. If it was fully loaded when you weighed it then there is nothing unsafe with what Michelin lists for tire pressures on their chart.
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Old 02-02-2013, 05:26 PM   #6
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The coach had full fuel,full water ,approx 60 percent propane,2 people, 2dogs and what we normally carry,so I guess the numbers are fairly accurate.
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Old 02-02-2013, 07:32 PM   #7
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Then if the size and load range of the tires match the chart the tire pressures on that chart are more correct than the decal in the motorhome.
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