kind of both. If you were in a wide open area where turning around was not a big deal then I would say weight was the biggest factor but on most trails just a combination. Again that is with 35's if I were able to run 40's or bigger I might feel differently. I wheeled my jeeps a lot in the snow and was pretty confident I would always get myself unstuck. I don't have that trust yet in the PW at least the way it sits.. Now on a slick highway pw all day long over the jeeps running exactly the same tires. I have 1000's of icy highway miles running Toyo R/T's in 35x12.5-17 on both and for sure the PW much more surefooted on the highway.Would you say that the size is more of the problem or the weight?