That air system for the tires is sweet. A few years ago on an elk hunt I drive through deep snow in my four wheeler, thinking if be by myself at the top of the ridge road...I was wrong. A few minutes into glassing I heard a truck coming. It was a 3/4 ton diesel that was driving up that road like no snow was on it!!! Utterly confused, I asked him how the heck he got up there in that. He simply drops his tire pressure and drives in deep snow with no problems. I'd never seen that done before. Makes sense though.