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      09-27-2012, 04:31 PM   #7
BMW Fanatic

Drives: slow
Join Date: Jul 2009
Location: Calgary

Posts: 3,314
iTrader: (11)

For that rim and what you're describing I'd go with 245/40/18's WS70's. Sure you might give up some dry performance, but for those brutal days they'll get you through with no issues. I ran 235/40/18's WS60's last year but will be moving towards WS70's this year 245/40/18. If you ever knew how bad Calgary winters were and me telling you I got through it with no issues, this should definitely be first choice.