A bicycle component is provided with a manual input device, and an input circuit having a signal line, a power line and a comparison section. The input circuit is especially useful in electronic shifting. The manual input device has a first ON position, a second ON position and an OFF position. The signal line produces a pair of input signals corresponding to the first and second ON positions. The comparison section produces pair of output signals based on a comparison of the input signals with a reference signal from the power line. Preferably, the input circuit includes a power saving mode.