Safe PSI to air down to?

I run 10-15 psi when wheeling.

 

Done. Thanks Terry. Hope you all find this informative.

 

http://www.youtube.com/watch?v=2uyANsdO1rI&feature=player_embedded

 

http://www.youtube.com/watch?v=nZHMCQxALnU

 

The other thing that should be pointed out on this thread is:

A lighter truck riding on larger tires can air down further than a heavier truck on smaller ones.

So a reg cab on 33x12.5 can go quite a bit lower safely than a V6 Double Cab with an ARB bumper and winch on factory 31x10.5.

My "Trailhead" deflators came with a little chart; I don't have it on me right now, but IIRC a "loaded for camping" V6 tacoma on stock tires would air down to 15 psi. You could go lower in the rear if the bed was unloaded, until the bulge in the rear sidewalls about matched the bulge in the fronts.

My reg cab, on 33x11.5 I usually go down to about 13-14 in the front, a little less in the rear. As Especk is showing, I can probably run a bit lower than that.