Patent ID: 10618600

Abstract:
A speed-changing method of bicycle suitable for controlling a gear ratio of a bicycle is provided. The bicycle has a front electronic derailleur, a rear electronic derailleur, a controller, and a controlling switch. The controller stores a gear-ratio table. The speed-changing method of bicycle includes the following steps. The controlling switch is triggered to generate a speed-increasing signal or a laborsaving signal. The controller controls the front and rear electronic derailleurs according to the speed-increasing signal or the laborsaving signal to increase the gear ratio along a speed-increasing path of the gear-ratio table or decrease the gear ratio along a laborsaving path of the gear-ratio table respectively. On the other hand, the front and rear electronic derailleurs are started simultaneously at a first switch point of the speed-increasing path or a second switch point of the laborsaving path, and the first switch point is different from the second switch point.