Originally Posted by MisterBMW
The videos of the red ///M3 going around country roads appears to have 18" wheels, not 19". While I feel 19" will give the M a better and more aggressive look, will it affect ride comfort even with the 40-aspect ratio tyre at the rear?
Certainly it would have a minor effect. However, I went from 18s to 19s on my E46 and barely noticed the difference. The 40-series tires will have about the same sidewall as 45s on the E46. Should be fine.