Well this weekend I went out and played with the boys. I'm a lighter guy (140#) figured a 250 would be all I ever needed. Well guess what! Tried to climb some hills to get where we were going and the ole 250 just didn't have the nuts to do it. The hills were deep sand and I would get about 3/4 the way up and then she would just loose to much speed. The guys I rode with of course said it was just me and jumped on my bike......haha I made it farther up then they did..... Anyways we finally just let them go over the top and I found a way around that wasn't so steep and sandy. But in the sand there just isn't any replacement for displacement.