I was thinking that I would put 18" all the way around for winter use and try to go at least one size narrower also as narrower tires have more bite in the snow. I certainly won't be doing any high-speed bonsai runs in the middle of a Wisconsin winter.

One thing I've learned over the years is that no matter how much something looks like it would work, ask someone who's done it. One of those lessons that I've learned the hard way so many times. Thanks