110 psi tire pressure??

ken burke wrote:
All . . . . help. What tire pressure should I use on my ST235/85R16 tires by West Lake (forest river). My 5th wheel is heavy, i.e. 3000 pounds on each wheel and tongue. (15,000 pounds total). My tires are G rated and limit is 4080 pounds (actual weight is 3000). Max presser on is 110 psi. Do I have to run that high of pressure??
The problem is how to I get that pressure with a portable tire inflator? Also most tire inflators are DC hooked up with the trucks 12 volt. that won't work.

thanks . . . . ken

Have put it in my made calculator and filled in that 3000 tonge weight and Loadindex 129 as given , gave 90psi as answer.
BUT this is not what I would advice.
First your maximum load is calculated for 65m/h so I lowered the loadindex by 5 steps to give the tire a deflection that it would need for 99m/h , saver and less fuel consumption and still acceptable gripp.
Second your tonge weight is as you give 20% of total weight and as far as I learned in America for middle -axle trailers by law it must be between 10% and 15% , but correct me if I am wrong.
If I fill in 10% tongue weight so 1500 lbs and that lower loadindex of 124/3530lbs maxload i come to an adviced pressure of 118 psi , wich tiremaker does not allow anymore ( earlier days 10 pasi above that 110 psi allowed) so you have to keep them to 110 psi.

This is higher advice then the TT maker would give , but sertainly save for the tires and still not to much bumping.

To yust keep your tires on pressure , even a bicycle pump can do.
Ofcource not to fill from zero to 110 psi , but the average 10psi fill upp needs about 20times pumping a tire.
Those for race-bycicles with manometer can fill to your pressure.