I was wondering which factory rims and tire sizes will fit on the 850 wagons. Mine has the 16" on it, I was wondering if some of the more modern and larger rims might fit like a 17" or 18". My thought is to get a larger set for summer as my 16" have 2 snows on them so I could get 2 more snows and they would be my winter set. Has anyone installed a newer set of factory alloys on a 850?