Patent ID: 8886417

Claim:
An electronic shifting system for a bicycle, comprising: a first switch mechanism; a second switch mechanism; a control unit in communication with and responsive to signals from the first and second switch mechanisms; a rear gear shift mechanism in communication with and responsive to command signals from the control unit, wherein actuating only the first switch mechanism sends a first signal to the control unit which is configured, in response to the first signal, to send a first command signal to perform only a rear gear shift mechanism upshift, and wherein actuating only the second switch mechanism sends a second signal to the control unit which is configured, in response to the second signal, to send a second command signal to perform only a rear gear shift mechanism downshift; and a front gear shift mechanism in communication with and responsive to the command signals from the control unit, wherein the control unit is configured to determine when both the first switch mechanism and the second switch mechanism are actuated concurrently and responsively sends a front shift command signal to perform only a front gear shift operation.