I had 20" rims and summer tires on my previous X5 and they were okay during winter (even through snow storms). I would say "better" than rear drive cars (Lexus IS300 with winter tires, for example).

I am considering getting 20" rims with tires since tires on my 19" are getting tired. And I wonder if MAXX really makes our X5 a 5000lb sled? Are they just worse in winter weather compare to other summer tires?

Thanks,

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2011 X3 35i
2008 X5 4.8i
2003 330xi -sold-
2001 X5 4.4i -sold-
2001 M5 -sold-
2001 M Roadster (SCed, Highly modified) -sold-
2000 M Roadster -sold-
1995 325is -sold-