Originally Posted by Mike Canter
That is just not right to inflate a tire to the max pressure on the sidewall. So what if the tire only requires 70 psi and the max is 125 psi on the sidewall. You would have a rough riding mh plus wear out the tire center plus have less traction in the rain because you are just riding on the center plus the mh is going to be real sensitive to steering and will be jittery. With your mh full of fuel, propane and water go to the closest truck stop with scales and weigh it so you have total weight on the front axle and total weight on the rear axle then look at Toyo's Load/inflation table for those tires which you can get from the dealer that sold you the tires, or search the Internet or somebody here can give it to you. Compute out the weight on each tire and look on the table and add 5% and that is your cold inflation first thing in the morning before you drive it
The problem is not being able to weigh each tire, or dual set, individually. there is no way to know what the weight distribution is across the axle. If one side is considerably higher in weight than the other side, then one side will be under-inflated and the other side overinflated.
It then becomes necessary to inflate to the sidewall pressure for max load until it can be determined what the actual load for each tire is. In my opinion I consider this the "safe rule."
One can also use the "Chalk line" method to determine under inflation or over inflation. In a parking lot, draw a chalk line across the tread of the tire. Drive the vehicle several feet and then check the chalk line. If the center of the line is worn the tire is over inflated, if the outer edges of the chalk line are worn, the tire is under inflated.
Never exceed the sidewall max load pressure, and always check when the tires are cold.