Never heard of that before. I ordered winter tires and rim specific for my 2015 Macan S from Tire Rack and they worked great.
After hitting a deer in November with these winters on, I now have my set of 20" RS Spyder EOM rims and summer tires for sale, if you are interested. Driving an X3 now. You could put winter tires on your original set of rims if they are 18"
I am in Calgary
-Malcolm