Ive had the original bighorns on an Can am Renegade 800 and I had the Rip saws on a Can am Outty 800. So i guess take it for what its worth in the side by side world. I really liked the rip saw's. Extremely well made and i did not EVER have a flat in about the 600 miles i rode them before selling to get my pioneer. For me they were a great all around tire and the 1 1/8" tread depth was enough for the once in a while trip to a mud hole or down the river. Seem to be a stiffer compound so I think they would have excellent life as far as atv tires go. One down side is if you're in really slimy/greasy Sh!! they wont hook up quite as well. Still a great tire.
Now to contradict myself....sort of... I have been spending the last 2 weeks researching tires for my P1K. To make a long story short my main considerations were #1 LONG life #2 good all around tire.( pavement,gravel,trails, fields, creeks, etc.) An ATV tire is gonna go 2000-4000 miles AT BEST. A light truck tire will go 20,000 miles easily...if you don't destroy it. haha So I just picked up a set of off road light truck tires. 235/75/15 measuring 28" tall and I bought a set of 15" STI wheels. Got a good tire connection and the tires only cost me $100/ea. I'll know by Tuesday if this half brain idea is going to pan out, and which will last longer, the tire or the pioneer.
Hope this helps.