A dually in the snow floats on top the back wheels just spin on top. The snow on in the Pacific Northwest is wet it turns to ice soon as you spin your wheels on it. We have problems with people that are from east of the Rockies coming here in the winter time and figure we can drive in snow no problem. The biggest problem is the snow where they are from is drier its sticky so your tires bite into it. Here its wet and heavy you make a snow ball and throw it at somebody its like throwing a rock at somebody its hard.

In my area the highways dept can't even scrape the compact snow off the road with a 14G Cat Grader with a regular moldboard. The only thing that makes a dually bite through the snow is V bar snow chains and weight in the box.

Doing the conversion isn't too bad if your mechanically inclined.