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[BlueM3Wagon]

Ok, so here is what I've got. Need some help and recommendations. Currently have the e91 LCI with front end conversion to M3 and rear fenders rolled. Summer tire setup is AG M359 19/9 et 35 in front with 245/35 and 17.5mm spacers for flush fitment. Rear is 19/10 et 38 with 275/30 and no spacers could probably use a 5-10 mm to put nice and flush.

I'm picking up some 220 19" OEM wheels and want some advice for winter tires. Since I still have the LCI e91 rear quarters I know et 23 in the 9.5" rim is a tight fit. I think the fronts have plenty of room so not concerned. My question is, should I go 255/35r19 square on the tires so the rear is slightly stretched to help with the limited space rather than doing staggered winter tires? Thinking about PA4s which I understand had a more square sidewall, doesn't this affect the fitment on the rear?

[BlueM3Wagon]

So thinking this through, there really aren't winter tires in 30 because requirements are 35+? Currently the 245/35 on the front rub at full lock which makes me believe the 255/35 would as well since it's 1/4" taller and almost 1/2" wider. So I don't know if that would work up front. What is the smallest tire i can run on 9.5"? Tirerack site says 235/35 but that seems really small? If it fits I could run 235/35 square tire on front and back?