An automatic bicycle shifter making use of a global positioning system (GPS) altimeter for sensing road inclination, an accelerometer for sensing bicycle acceleration and a hot wire anemometer for sensing wind load, and through application of classical law of conservation of energy attenuates or appreciate automatic shifting speeds in real time to maintain a rider standard shifting torque. Automatic bicycle shifter is additionally provided with capability to sense, record, and interpret rider automatic shift override commands and further adjust automatic shift criteria to rider preference.

Bicycle including a frame with a fork, the fork having dropouts between which a wheel axle is mounted. The wheel axle includes a sensor and/or an electric component arranged to be connected to a control element. A detachable electric connection is provided between the sensor and/or electric component and the control element. The detachable electric connection includes a short range wireless connection.

A communication system includes a first communication device, a second communication device and a third communication device. The first communication device is configured to be connected to an operating device mounted on a human-powered vehicle. The second communication device is configured to be connected to a transmission device of the human-powered vehicle. The third communication device is configured to be connected to a component that is mounted on the human-powered vehicle and that differs from the operating device and the transmission device. The second communication device is configured to receive first information that is sent from the first communication device in response to operation of the operating device. The third communication device of the component is configured to receive second information that includes at least some of the first information sent from the second communication device.

A bicycle including a frame with a fork, the fork having dropouts between which a wheel axle is mounted. The wheel axle includes a sensor and/or an electric component arranged to be connected to a control element. A detachable electric connection is provided between the sensor and/or electric component and the control element. The detachable electric connection is positioned between the wheel axle and the thru-axle.

A control device of a gear transmission-equipped vehicle includes a power controller that starts power reduction control when it is determined that a start condition is satisfied, the power reduction control being control of reducing power transmitted from a driving source to a gear transmission. The start condition includes: a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions; and a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.

An operating device for a human-powered vehicle comprises a base member, a first electrical switch, a second electrical switch, and a third electrical switch. The base member is configured to be coupled to a handlebar of the human-powered vehicle. The first electrical switch is configured to receive a first user input indicating upshifting of a first gear changing device. The second electrical switch is configured to receive a second user input indicating downshifting of the first gear changing device. The third electrical switch is configured to alternately receive a third user input and a third additional user input. The third user input indicates upshifting of a second gear changing device. The third additional user input indicates downshifting of the second gear changing device.

A component is configured to be mounted on a human-powered vehicle. The component includes a communication device. The communication device is configured to receive predetermined information sent from a transmission device of the human-powered vehicle. The predetermined information includes at least some of first information that the transmission device receives from an operating device mounted to the human-powered vehicle.

An operating system for a human-powered vehicle comprises a first operating device, a second operating device, a first user interface, and a second user interface. The first operating device comprises a first base member and a first operating member. The second operating device comprises a second base member and a second operating member. The first user interface is configured to receive a first user input and mounted to the first operating device. The second user interface is configured to receive a second user input and mounted to the second operating device. At least one of the first user interface and the second user interface is configured to be operated to control an assist driving unit configured to assist a human power.

A bicycle derailleur comprises a base member, a movable member, a motor unit, and a controller. The controller is configured to control the motor unit to rotate an output shaft of the motor unit at a first maximum voltage during a first shifting operation of the chain in a first shifting direction. The controller is configured to control the motor unit to rotate the output shaft of the motor unit at a second maximum voltage during a second shifting operation of the chain in a second shifting direction. The first maximum voltage is different from the second maximum voltage.

An operating device for a human-powered vehicle comprises a base member, a first electrical switch, a second electrical switch, and a third electrical switch. The base member is configured to be coupled to a handlebar of the human-powered vehicle. The first electrical switch is configured to receive a first user input indicating upshifting of a first gear changing device. The second electrical switch is configured to receive a second user input indicating downshifting of the first gear changing device. The third electrical switch is configured to alternately receive a third user input and a third additional user input. The third user input indicates upshifting of a second gear changing device. The third additional user input indicates downshifting of the second gear changing device.