Tirerack does not have the winter tire packages and winter product searches programmed into the website yet for the M3. I am trying to push for this to be done soon. In the meantime, anyone here is welcome to call me directly. My number is in my signature.
To credit the forum, click through one of the banners in my signature and the top of the page, or call me direct at 877.522.8473 ext 660.