When I was looking for tires I was very much interested in the Toyo Open Country M/T because of the siping. I ended up with Goodyear MT/Rs because the Toyo only came in 35 and 38 inch sizes. But since then, the Toyo has been made available in 31 and 32 inch sizes. May be worth a serious look for those looking for a good offroad tire....The tread pattern is very similar to the MT/R, but with some siping in the middle of the tread blocks.