Has anyone ever held a class on winter biking?

We're thinking of offering one, and I'm interested in what other people have done. I've checked out icebike.org a little, and done a little internet research.

I was about to list the topics we're thinking of covering, but I'm interested what other folks thoguht was important.

What were some unexpected responses or questions or things that you hadn't prepared for?

Thanks, everyone.