Narrow tires seem to help gas milage a bit, folks claim it helps in the snow.
Some mud tires like Simex Centipede are narrow and seem to work well in mud.
But Boggers are very wide and work well too so go figure
Like he said, depends on the terrain. A wider tire is for floatation. Sand and such. They also work well on big rocks because they wrap the rock for traction when you air down.
The swamp racers all use a tall skinny tire, and snow is best with a open lug narrow tire.
In mud I found a narrower tire better, same in snow, but I don't run on rocks like many of you do. So its dependant on your use. I prefer a narrow, taller tire, with lugs wrapped over somewhat onto the sidewalls for the offroading I do. But your terrain appears about as different as you can get from mine.
I like them wide and wont go any narrower than a 12.5 I like to float on the snow and mud rather than sink down to my axles. I run about every terrain and have not found anyplace OFF THE ROAD where narrow is better but I have found wider to be better.
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