Critical Mass post script
I meant to include that the total miles traveled during the CM ride was about 21.6 for the day, according to my odometer. I also managed to stay in one gear (singlespeed baby!) the whole time, with the exception of when I sprinted ahead of the pack on a hill climb. After the group passed and I needed to take off, up hill, and catch up, I shifted down one gear. So I nearly kept to my SS roots.