In general terms are all-seasons (18's or 19s') good in the snow combined with X-drive? I'm considering buying some take-offs already mounted with all seasons (brand new). First hand experience would be helpful.

Thanks.

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08 BMW X5 4.8i - GONE after 6.5 yrs
Space Gray / Light Beige
Premium, Sport, 20's, Technology
SAT, Rear Climate,Heated