I have a set of 31x10.5r15 good year wrangler authoritys. Very much like the duratracs. What psi would you say I should run for proper tire wear. At the moment Iv got 25psi and does fine but cant help but think theres a better psi. So what are yall running in your 31s?

 

27-30

 

try the tire paint test
get bright colored spray paint, spray 4 lines across the tread, let it dry. start with short drives and check how the paint is being worn off the treads.
http://www.aa1car.com/library/tirewear_chart.gif
http://freeasestudyguides.com/graphics/Tire_Wear.gif

 

Ill try going to 27-28 and see if thats it thanx

 

Hmm never heard of doing that before mite try it though

 

I run 30psi, seems to keep my tires fine.

 

Depends on vehicle loading. I've covered how to determine effective tyre pressure on various boards, and the method can be found readily - all you need is chalk and time.

I'm not even going to begin to give you an idea, because I don't know. And yes, it's possible that front and rear pressure will be different (due to weight distribution.)

Ideal pressure for tyre wear is usually the same pressure that gives you lower rolling resistance, so that puts you in a useful place anyhow.