You definitely don't want to be using your good racing tires in winter. There's more stuff on the ground that can cause punctures and nothing ruins a ride like changing a tube with your gloves off, sweaty and standing by the side of the road. When I ride in the winter, I just make sure to clean my bike afterward and I'll use a heavier chain lube if I'm doing a lot of winter riding. I'll also be sure to keep my cables well-lubed, especially if it's wet.

Good luck! I suggest giving it a try with what you have now to see if you like riding in the cold. Just layer up and refer to Bicycling's guide based on the forecast: http://www.bicycling.com/whattowear?...erence=0&x=&y=