I have yet to get spare wheels and snowtires for my recently acquired 945. It has 16" alloys with summer tires. But I do have 4 14" all weather tires on my '81 245. I am thinking of swapping the wheels between cars for a trip over the North Cascades for Thanksgiving. I am likely to encounter snow and ice on the passes. I also have chains for the 14" tires. Is this a workable idea? I'm pretty sure the circumferences of the 14" and 16" tires are similar, so my speedometer will read ok. And I know the 940 won't handle as well on the dry pavement, so I'll have to make allowance for that. Any other problems you can forsee?