I went out with some friends yesterday and at the trail head they all started to air down. I then realized that I had heard of this practice, but being new to wheeling had never done it. I also then realized that out of all the posts I had read there was no real guide for airing down. A search for information did not yield any good results. I have a 92 80 mostly stock. I have BFG 315/75/16 AT's. What air pressure would be reccomended and why is airing down desireable? PS. Ran Turkey Creek from Bumble Bee to Cleator.