A control device for providing at least one electrical-electronic command to at least one bicycle component is provided, including a support body carrying at least one switch, a respective actuation element, and a respective manual actuation member. A congested link is identified and a throttle rate is determined for one or more of the traffic groups traversing the congested link. A clear portion covers the electronic display. The pixel correcting section corrects the pixel output of each phase difference detecting pixel based on results of the first and second pixel output variation detecting sections. The assembly can be covered with a graft as a support therefor.