Actually, that bike has 18 speeds now. I tried it single-speed for a few months, but it wasn't kind to my knees, so I reinstalled the derailleurs and gears. My route is pretty hilly.

Another nice commute here this morning. It's a little warmer and more humid today, and I took it easy because my legs need a break. I've ridden 25 out of the past 30 days.