I don't post much on these boards, but can't resist giving my opinion on this topic. I have owned many rigs with every tire size from 31's to 40's. I enjoyed all of them. I believe that a small rig and a large rig can both be unstoppable on the trail as long as they are well designed. I think were people get in trouble is some where in the middle. If you want a lightweight smaller rig, make it just that. Don't try and run a 14 bolt and then 37 inch tires to save a little weight. If you want a big rig, slap some 44's or larger and build the rig around the tires. Don't try and save a few hundred pounds by not beefing up the parts that take the abuse. My new rig is probably on the large side. It will have 46's, rockwells, front and rear steer, and a 118 inch wheel base. My wife's future rig will be a toyota mini truck on 38's , toyota axles, 4.3 vortec, and an atlas. It's wheel base will be around 116 and will be very lightweight. I fully expect at the end of the day, both of us will be at the end of the trail enjoying a beer. However, we may have to take different lines to get there.