Quote:
Originally Posted by GARunner
Is it a good idea to increase rear tire pressure when towing a heavy load? In my case, I will be towing a fully loaded U-haul 6' x 12' trailer (1800 lbs empty). I have checked around on several web sites and only became confused. Most people were talking about tires which have a max pressure of 35-40 psi. I have the Dunlops which have a max pressure of 51 psi.
Also, since I have the four wheel drive V8 would I need to increase the front tire pressure as well?
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With truck tires its not so cut and dry.
What's your tire rated at? C i would guess? What is your load index?
This is what i did to make sure i met the important points.
I went with C 112Q rated Duratracs.
4R RGAWR (rear) = 3439 lbs /2 = 1720 lbs (no load) per tire and since 112 load index = 2469ea at 50psi i can run the C 112Q rated Duratracs at ~38+ psi and exceed the actual no load RGAWR still. If i need additional weight capacity i just bump up the air pressure and get up to the full 2469 at max capacity of each tire exceeding the stock required load index. Though i wouldn't want to go to max PSI for high temps or really long trips.
So far ~38-41 PSI (front and rear) has been fine with the 4R loaded up on my C rated with a 112 load index Duratracs.