Tire inflation pressure
I have seen it posted many times to inflate tires 5-10# over rv listed tire pressure. Why would you do this?
Forum Discussion
Your best tire pressure is one that will be high enough to run without heating beyond the tire's maximum temperature. But not so high that it will exceed the tire/wheel maximum pressure when it does heat to running temperature.
Considering that the side wall flexing causes heating, and weight causes side wall flexing, it is a best guess as to what the tire pressure will be advised by the tire or coach manufacturer.
The only method I know of that will find the best pressure is the TPMS that will give pressure and temperature, and a experiment in pressure trials.
I started at the recommended pressure, and found that the tire heated to 125 pounds at 100 degrees, 5 over max. So I increased the pressure, the next morning I found the pressure was 90 PSI, cold but none were the same. I then treated each tire as a separate experiment. until I found the magic number. Now we inflate to that number when we find them low.
Considering that the side wall flexing causes heating, and weight causes side wall flexing, it is a best guess as to what the tire pressure will be advised by the tire or coach manufacturer.
The only method I know of that will find the best pressure is the TPMS that will give pressure and temperature, and a experiment in pressure trials.
I started at the recommended pressure, and found that the tire heated to 125 pounds at 100 degrees, 5 over max. So I increased the pressure, the next morning I found the pressure was 90 PSI, cold but none were the same. I then treated each tire as a separate experiment. until I found the magic number. Now we inflate to that number when we find them low.
