Quoting Blown1:
Quoting gvr4ever:
Skinny tires work best in snow. 195/60/15 stock is what I'm running now. If you go for a 205 tire, you would want 205/55/15. I've been running this size for summer tires.
A 205/55/15 is actually a lower profile tire 205x.55=112.75, 195x.60=117 would be worse in the snow but awesome for dry weather
205/55/15 has very little effect on the speedo. Using online tire calculators, it is only 1.38% off at 60MPH. I may have made the assumption that the OP actually cared about that. 205/70/15 would be 8.62% off at 60MPH.
As long as people don't care about how accurate the speedo is, then as long as it fits, it can be used. Wider tires tend to track more and could technically float more on snow, but really 205 isn't really all that wide. The only reason I'd go for a off size for winter tires is if I could get a crazy deal/sale,