Just put on some Continental ExtremeContactDWS & tested the G37s coupe on some light snow covered roads w/no extra weight in the trunk; no slipping so far. Gotta say these tires are real good. Will report back when it snows again.

 

Reporting back. Put on the lm25 and had some snow last weekend. Went drifting in the snow for hours. I was amazed at how good the gripped. Going up hills from a dead stop in reverse, no problems. Brakes amazing, from 20 mph to stop in 2-3 car lengths on packed down snow / ice.