youll be amazed waht dropping the pis will do
i took my mom stock 4x4 navigator out in pismo dunes full of people and climbed comp hill easy

 

YukonRon,
Your right. There really is no "concrete" rule to tire size, width, pressure, heigth. I have to admit that much of my tire "experience" has been with full size rigs, and not quads. With a full size rig, with the exception of sand, flotation does not work! The amount of weight that you are trying to move is directly dependant on the amount of traction you can achieve. If your tires are "floating" on top of mud or snow, then your probably spinning your tires and going nowhere, based on the amount of weight you are trying to move. That isn't as true with a quad. You can "float" your quad and still get traction due to the fact that it weighs much less. Since you don't have as much mass to move, you don't need as much traction.

Rick

P.S I took my pickup down to the beach one weekend with a buddy of mine who owned a Warrior. Before we went out on the sand, he had me deflate my tires to 10psi. Thats the only reason I was able to go anywhere out on that dry sand. Plus the fact that I have Detroit lockers front and rear on my truck. With all that going for me, my buddy did his best to try and get me stuck. It didn't work, in fact there were other people there that told me no one had ever made it down some of the roads/trails I made it down that night! That illustrates how much a wide foot print can help in the sand.