I'm running 255/35 front and 265/35 rear Bridgestone LM-60. Some run a 235 front but I was worried about sidewall height in winter. Also, some run 275 rears but I would be worried about snow traction... so, 255/265 was a middle of the road compromise. I find it works well so far in cold, wet weather. No snow yet so I can't comment on that.
2016 M2 | Long Beach Blue | 6MT - current
2015 M4 | Austin Yellow | DCT
2014 Corvette Stingray | Z51 | Torch Red | 7MT
2012 MB C63 Coupe | Performance package | Obsidian Black
2011 E92 M3 | Jerez Black | Fox Red | DCT | Competition Package