In most cases it would depend on the terrain. In my region it's hard pack and stiffer tires make it easier to steer and the tires tend to last longer at higher psi levels. In winter i bring down the pressure so that more of the tire contacts the ground for more traction. I also don't like hauling a trailer full of firewood with soft tires ,but softer tires give a smoother ride.
Simply adjust your tire pressure for your situation.
I found that the original rancher 420 Maxxis tires ran best on gravel roads at 8psi. Anything below 6psi made the machine sluggish. Therefore 7psi was the trade off.
It should also be considered that i am not a lite person and i am carrying a cargo box with a chainsaw, getting un-stuck tools, an axe, and some geologist tools at all times.
Last edited by nanuk; 04-11-2012 at 06:45 PM.