the gear seer analyze your bicycle drivetrain

what is this?
compare another drivetrain

rim size: tire size:

output:

(note that you should read the labels radially, i.e., along the shaded contours, rather than horizontally or vertically. this is sort of the key idea of this graph.)

if you want to make edward tufte cry—or just remember what the web was like in 1998—analyze your drivetrain here, here, or here.