I have to get a winter tire setup for my X6M. I used to have a winter car but not any more. I checked my dealer for 298M style and he is asking for $4700 including an installation. So, I am thinking of just swapping tires using current wheels. I may get a new tire/wheel package for summer as my current ones are getting old.
I found that people are getting 275/40 R20 Front and 315/35 R20 rear same as an OEM summer setup. I thought that a narrower the better for the winter. Is there any reason not getting 275/40 all around. I think that a rear wheel can take this size. If I am wrong, let me know. Any input/suggestion will be appreciated regarding a tire size.