It seems I have a lot of explanation to do.

I would say stock 15 rims can fit any 215/60R15s, not only winter tires, go to Michelin web page, and check out the catalog of different tires:

For same 215/60 R15 size, the section width on measuring rim of 6.5 inches:

Arctic Alpine snow tire: 8.7 inches.
Pilot XGT V4 High performance: 8.9 inches.

I don't think that 0.2 inches makes any difference.

Actually check the tire catalogs for every 215 tires, Michelin uses 6.5 inches rims as standard to measure section width.

Michael, the reason I chose wider snow tires is because I feel dry road traction with those 195s just couldn't handle 270 hp from my 400E, so I compromised some snow traction for it.

The dry road traction of those 215 snow tires are much better than previous all season 195s, I can hardly slip rear tires now, I have already gone through snow several times here in Canada, it handles not bad either.

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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.