The 15" fit just fine. The problem is how much the rims will cost you. By the time you buy the alloy 5-Hole MINI rims, and a set of good tires, you can buy the 16" non-run-flat package for just a few bucks more. For a few bucks more than that, you can get the 16" run-flat winter tire package.
The 15" in general, and especially the 15" steel rims were not recommeded by my dealer. But they don't know as much about the car as we do:
1. The 15" rims won't clear the larger brakes/rotors of the S. The S does not have different brakes. It has the same brakes as the Cooper.
2. There won't be enough clearance between the brakes and the rim to allow for snow accumulation. Then why is a Cooper with all-season tires OK?
3. The 15" rims won't dissipate enough heat for the extra weight of the S on the brakes. Especially the steel rims. So the brakes will overheat, in winter? Come on.
4. They don't make run-flat 15" winter tires. Yeah, so? So, MINI Roadside assistance won't assist you if you have a flat, and no spare, and no DSST tires.
Anyways, most of the above reasons are crap. But ultimately, it would have taken a long time to order the 15" alloys (which I wanted) or steelies (uglier) and then I had difficulty tracking down the tires I wanted. The whole thing was way easier to just buy the package. I splurged for the DSST ones, because I like the idea that Lady Leadfoot is safe when driving by herself.
Chilli Red/White Cooper S, Sport Pack & Sunroof. Delivered June 12th, 2002!
Now with MCS Winter Tire Package.