Thanks. I saw the posts
. I was considering the 18" winter wheels then I saw on Kijiji someone local selling his X1 OEM 19" wheels never used.
Too bad that the space under the cargo area is not deep enough. I would do like you said to throw a summer wheel in there.
For now, I still have runflat for the summer tires. For the winter, I went with non runflat, Nokian tires.