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      11-26-2012, 01:57 PM   #9
Private First Class

Drives: 535i xDrive, C4S cab
Join Date: Jan 2011
Location: Hudson Valley, NY

Posts: 110
iTrader: (0)

Originally Posted by VWtoBMW View Post
I should add to my earlier post that although I prefer the look of my 19" summer wheels, the drive using 18" Pirelli Sottozero's for winter, non run flat, is amazing. Smooth, quiet and forgiving on every bump.
I think a good bit of the ride difference is run flat to non run flat.

I run non run flat summer tires on the 351 19 inch wheels and winter non run flat on 350 18 inch wheels.

The height of the 245/45 x 18 sidewall does seem more appropriate and robust on poor road surfaces.