if anyones interested in this info i came across, by all means.
i came across while looking into a narrow tire vs. a wide tire. the argument was that the wider tire, due to more surface area acting on the other material (ground), would have more traction because there was more grabbing potential.
this statement in fact if false and heres a good little read about frictions and such.
And some more reading if you feel frisky haha
"A wonderful example of "In theory there is no difference between theory and reality. In reality however, there is."
The total friction may be the same, but there will always be more available traction offroad with a narrower tire. It's about loading, a larger footprint has a lower pressure on the ground for each square inch of the contact patch, therefore is easier to break loose. You will do much better in mud and dirt with skinnies - they dig down in mud and may better find something to bite on, and on dirt or whathaveyou they put more weight on the tread to get grip and keep you moving. With harder surfaces it can go either way. In sand, the narrower tire's better bite will dig holes - not good. So wider - assuming you get wide enough to provide some flotation - will probably be better. On snow, narrower tires give a better bite and better traction - but in Deep snow, wide enough to provide flotation might be best (gotta go REAL wide though!) Also note that larger diameter tires increase the footprint too, and mathematically/geometrically allow for a better climbing, final gearing being the same. Whether wide tires or narrower tires are better for your type of wheeling is the issue each has to decide. Like most things, there is no "best" answer - it's all relevant."