Ron,
You really don't say what you are going to do with tractor in the snow. Now in my case, I use a blower, ballast box, and no chains. I have the R4s and with the wieght, 4wd, locking diff, and brake steer I am just fine. I also us it on finished concrete and really wouldn't like the mess it would make on it. We will need to know more to give you good info. :good2: