Originally Posted by WeRCreekers
Ducky, I run my 614's at 105 psi cold (+/- a couple). I am not very close to the GVWR loaded, probably around 14,000. Are you saying I'm running with my tires over-inflated? BTW, I use a TST TPMS on my trailer tires.
This should help: http://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
I also use the TST system. Works great.
The best way to determine load is to weigh each tire. It's just not practical. So I head to a CAT scale and weigh the trailer while hooked up. That is the number I use. So let's say its 13,000 lbs. /4 tires = 3,250
Look on the chart and you will find the correct pressure for the load is 90 rounded up to the 3,300. Some folks add 10% for the Gipper. I do not. With proper inflation I get excellent tire wear, great ride and no bounce.
Rolling resistance is greater but not significantly to justify the negative aspects of over inflation.
My method is not exact. It's an average. I do that because I'm not as picky as I used to be.
The Left (ODS) is heavier than the Right.
The Front axle bears slightly more weight than the rear.
Results: On a hot Summer day cruising down the highway at about 62 mph, my tires inflate to 108 psi and run at 100*F.
Smooth, cool and well within specs.