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Old 07-21-2012, 01:32 PM   #7
chuck&gail
Senior Member
 
Join Date: Mar 2011
Location: Colorado Mountains
Posts: 422
Quote:
Originally Posted by Jim W View Post
What you should really do is weight each tire and axle load of a fully loaded trailer. Than the highest loaded tire weight for each axle will determined what the tire pressure should be.

As an example say you are using Michelins XPRIBS on you trailer, that are LT245/75R/16 LRE size tires. You need to weigh them individually to find out the proper load that that tire is supporting. Now one side of the axle tire load is 2600 lbs and the other side load is 2900 lbs than you will need to inflate the tires of that axle to 70 PSI. The 70 PSI will support 7625 LBS with this type of tire. The other axle may have a different air pressures depending on its supported load.

This is true for all RV tires all though most users of RV’s just inflated them to the maximum tire inflation that is imbedded on the side wall.
Jim W.
We have weighed each wheel, set pressure to TIRE MANUFACTUERES recommendation for that load (per axle as said above) plus 5 psi for luck. Worked great so far for over 200,000 miles with only issues being a few repairable nail punctures.

Having said that, NONE of those miles were using Chinese tires. It is a choice.
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Chuck
Wonderful Wife
Australian Shepherd
2010 Ford Expedition TV
2010 Outback 230RS Toybox, 5390# UVW, 6800# Loaded
Not yet camped in Hawaii, 2 Canada Provinces, & 2 Territories
I can't be lost because I don't care where this lovely road is going
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