I drive all year in Colorado. I just put F1-AS's on in the spring. Not too bad in light snow but they seem a little squirrelly on ice and the heavy stuff. When it gets deep I usually leave the Crossfire in the garage and bring out the front-driver with X-Ice Michelins all around. I would definitely invest in Blizzaks or X-Ice tires, I have used both and they do make a huge difference in the winter. Blizzaks are softer and do not like grooved highway very much, tend to follow the groves and push you all over the road.