All: Will I have any issues running 315 / 35 / 20 rears on my 2018 AMG GTR (eg, rubbing, ABS, or any other issues)? From my research and discussions with various experts, seems like I will be fine (perhaps the speedometer will be off ~5mph, but I can tolerate that). For context, winter tires that are performance grade seem very limited. And I finally found the perfect rear tires, but the sizing is limited (315 / 35 / 20 is the closest I can find to the OEM 325 / 30 / 20). I just dont want any rubbing of the tires or lights on my dash Seems like I shouldn't have issues but any insight would be appreciated. Always open to getting competing views and commentary

 

These will not rub
315/35/20 should work just fine

 

I just got a set of Hooser track attack pros for my GTS in 305s for the rear. They are awesome. They do make them for 315 for the 20 inch rears, but as a GTR I think you can run 345s I believe. They don’t have that size yet but I understand they will soon.
Just noticed you were looking for winter tires. Sorry.