I have 20" wheels on my 04 EB 4wd, and I ran Pirelli STR 245/50/20's for a season. They wore well (30,000 miles and still 6-7/32nds tread), but I had an issue with one being out of round. They aren't rated that great on TireRack for snow and ice, but I had EXCELLENT luck with them in 1+ feet of snow in PA for a trip last winter. I would recommend a larger size, probably 255/50/20 or 265/50/20 (I have the latter size on my Explorer now in a different brand tire). Put them on a 8-9" wide wheel and they will fit great. For a 10" wheel, you are going to need a 285-305 section width tire, and if you live in an are with a lot of snow, wider isn't always better. I am even considering a 245/55/20 if I can find them for my next size tire.