I feel like 275 isn't the best width for a snow tire...
I also learned VMR stopped making the ET20s in 18s.. guess not enough M3 buyers were getting 18s.
I'm hoping to find some Alufelgen CS7 or Sportline CS.16s in 18" that will work.
Current: 09 E93 M3
Past: 07 E92 335i, 06 WRX STI