I ride 11 miles one way, every day of the year. Well, except lately I've had a cold I just couldn't shake for over a month, so I decided to drive the last couple of weeks. It's about gone now.

If I had to ride any more than this, I'd probably not ride every day. If I had to go 20 miles each way, I'd probably drop it to 2 days a week, and I probably wouldn't ride in the winter. As it is, by the time I get to that last mile of my commute my toes and sometimes fingers are getting very cold. If I had to go more than another mile or two, I probably wouldn't ride in those conditions at all.