tire pressure on transforce ht tires

I made my own pressure/loadcapacity lists wich comes to lower loadcapacity for the pressure then the American lists, and even lower then the saver European lists.
Michelin adyust their lists to the American system of TRA, so those lists also give to high loadcapacity's
Planted PDF's for it at next map on my skydrive of hotmail adress.
Pressure/loadcapacity lists take the USA map
For that you first have to see what maxloadpressure your tires have.
If you read "maximum load xxxx lbs AT yyy PSI ( cold)" then the yyy is the pressure needed for the maximum load, and not the maximum pressure of the tire. Probably its 80 psi but can be different.
Then open the file in my map with 80psi beginning.
Search at front for the maximum load in lbs or the loadindex, and look the weights up , but first add 10% to it for savety-margin.
Made seperate lists for per tire and singleaxle and dualaxle, so you dont have to do the division yourselfes. Rear you probably have dual so 4 tires on one axle, front single ( 2 tires on the axle).

But if you give the tire-specifications and axle/tire combinations , I can put that in my tire-pressure calculator, and it calculates a save pressure.

dennyida -The best thing you have done is gotten the weights your RV axles are carrying. Was the RV in the usual "ready to travel" loading? If not make a guess on how much you will add and where or take it back over the scales.

Your rear axle seems a little on the heavy side. With the weights you gave 3,700 front and 9720 rear, look at the Michelin Tire Inflation Chart. Take a look at page 18 of the PDF file. According to the size you have, your front tires should be inflated to carry 1,850 lbs each or 50 psig as that pressure would carry 1,940 lbs. Your rear tires should be inflated to carry 4,860 each set or 80 lbs each as that pressure would carry 4,940. I have found that the tire manufacturers all have the same table.

I just put Firestone Transforce HT's on our 31' Jayco motorhome a few weeks ago.
65 psi in front, 80 psi in rears.
Handles fine.
We are just under maximum weights.

I put Firestone TransForce tires 225/75/16 on our 2008 Tioga 31W in Galveston Tx, traveled to the Northwest and back to NY. Did about 7500 miles. Front pressure 65 and rear duals 80, Had no problem with handling. Speed kept at 60 MPH.