Gear position sensing unit

A gear position sensing apparatus comprising:

• a shift control device including:
• a shift control device mounting member for mounting the shift control device to a bycycle handlebar;
• and
• a cable operating member supported to the shift control device mounting member for pulling and releasing a control cable;
• a gear position sensing unit including:
• a sensor housing;
• a first electrical contact member supported to the sensor housing;
• a second electrical contact member retained to the support member for movement therewith and for contacting the first electrical contact member;
• whrein the first electrical contact member, the support member and the second electrical contact member are supported within the sensor housing;
• a coupling member coupled to the support member and to the cable operating member for rotating the support member in response to movement of the cable operating member;
• wherein the coupling member is exposed to an exterior of the housing;
• a fastener for attaching the gear position sensing unit to and detaching the gear position sensing unit from the shift control device;
• and
• wherein the sensor housing, the support member and the coupling member are coupled together so that the sensor housing, the support member and the coupling member can remain coupled together when the gear position sensing unit is detached from the shift control device.