Before you all get crazy on me for the 315's. The fact is, you're 100% correct in saying that a narrower tire will give you better traction in fresh unplowed snow. A narrower tire does not have an advantage however, in simply cold weather or rain or icy conditions or on plowed streets. My wife will not be driving on anything but. Also, its bad enough I'm going from the 21 inch 325 rears to a smaller size. I cant bare the look of the 19 inch square setup. It looks like a bull with his balls cut off. I have a kickass lifted jeep with 35 inch tires for the snow.
