The rotational speed of the gear = pedaling frequency (pedaling frequency of the rider/pedaling revolutions per minute), and the rotational speed of the gear is controlled by the rider, regardless of the number of gears. For example, if the average pedaling frequency of cyclist A is 100 rpm, then the rotation speed of the toothed disc is 100 rpm.

The rotational speed of the flywheel (the rotational speed of the wheel) is related to the rotational speed and the number of teeth of the toothed plate, that is, the rotational speed of the flywheel = the rotational speed of the toothed plate × the transmission ratio (the number of teeth of the toothed plate ÷ the number of teeth of the flywheel). For example, if cyclist A rides a bicycle with 42 teeth, the flywheel has 2 1 tooth, and the pedaling frequency is 100 rpm on average, then the flywheel speed = 100×(42÷2 1)=200 rpm.