Originally Posted by MosesDKE
tirerack doesn't list anything for winter tires when I plug in my car... how are you guys searching?
Search by size.
Either 225/45-18 (best in my opinion) or
245/40-18 square setup (what I'm running) or
235/40-18 square setup (what BMW recommends)
Be sure to narrow your search to winter tires only. You'll need wheels also, but TR has a great set of cheap wheels for the M3
Cheap 8.5x18 wheels