I am going through my photos from NYC and thought I'd share the two below. Those wooden rollers are from the early 20th century. (The 21st Century label that you see in the green is for the bikes behind on the raised platform). I hadn't realized that rollers go back that far. The sign describing these said that early cyclists would have "races" in bars in which these rollers would be connected to dials showing speed and distance. Interesting! Isn't it?