I searched around but didn't really find a definitive answer to my question, and rather then spend weeks either prematurely wearing out my tires or using more fuel then necessary I thought I'd just ask the experts...

So, experts: <img src="/forums/images/graemlins/patriot.gif" alt="" />

I'm still on the OEM BFG rubber and would like to know the best tire pressure for both fuel economy and (on road) traction. I've got an '04 4x4 SR5 V6 Xtra-Cab, all factory (except maybe the brush guard and nerf bars).

Thanks!
Jitz

The best way to find the proper pressure for your vehicle is to do the chalk test.

Slightly overinflate your tires (ie low-mid 30's psi). Go to an open parking lot. Draw a chalk line across each tread, from inside to outside. Drive straight a hundred feet and see how the chalk wore.

If primarily in the center, they're overinflated. On the edges? Underinflated. You want the chalk lines to wear evenly across the tread. Adjust as necessary in small increments to get even wear.

Toyota recommends a higher psi in the rear than the front, which is very counter-intuitive - unless you're carrying a load. I've always run slightly lower (2-4 psi) in the rear than the front.

I ran something like 30/f and 28/r when I had the OEM BFG's because I wanted good gas mileage, but it does provide a slightly harsher ride. I run 28/f and 26/r on the Yokohama AT's Load Range D tires I have now, which is a nice compromise of wear, mileage, and ride.

Hey, thanks Little_Joe. That info helps...

Isn't it amazing how the oil companies have finally got us willing and happy to pay $2.45 a gallon? <img src="/forums/images/graemlins/scared.gif" alt="" /> I'm in the wrong industry! <img src="/forums/images/graemlins/confused.gif" alt="" />

35 psi on road
14 psi not on road
no problems..... <img src="/forums/images/graemlins/cheers.gif" alt="" />

Same here with the 32" BFG M/T's

This is exactly what I was trying to avoid... Several people that have different opinions... <img src="/forums/images/graemlins/confused.gif" alt="" />

I did little_joe's chalk test and found that his numbers were just about dead on, but I think those numbers might change with the seasons.