I have been riding year round for about 6 years now (didn't need to before that). For the first time ever, we had multiple sub zero days here, and I learned that even though cold makes the tire & tube denser, air will still shrink and you still need to put air in on those days or end up riding on mushy sluggish tires.

First time i rode after a big snow dump as well, and i learned that you can go on those plow pile narrowed streets, just watch out for potholes, especially ones that may be filled with meltwater....!

I also learned that i need better breathing protection, because exerting + biting cold air = not good.

- Andy