Hi, you're right, the videos show by themselves. My other concern is about snow, slush and ice. Like we see on a video with escargo tracks the argo goes throu deep slush and come back on ice fairly easy ( can't do that with tires, I happened to be stuck on a lake, ice brooke, and I had to crowl on ice and find something to winch it out. If the ice wouldn't hold my weight I could freeze to death in the argo by the time somebody finds me). In deep snow would I have to add width on adair or the original 14 1/2 " will do good. Is it good if I just put some on the outer side so I don't have to add spacer.