I'd start with the pressure recommended by the manufacturer and go from there. (note- always measure tire pressure cold). If you're going to load up heavy, you can add air first, but don't go over the max pressure stated on the tire.

Again, check only when the tires are cold, less than 1-2 miles from the house if you have to go elsewhere to inflate them.

 

moved to the general section due to no RAM technical issues.

But i also think trying less air pressure to get more tire-to-road surface area would help.

 

and it's a 3yr old thread so I think he's squared away by now..lol

 

Wow.....usually I catch that but I guess I missed this one......LOL

 

lol well its a good subject, i run 35 psi in mt Copper H/T Plus's and 40 with a load on my stock 20's