Bicycle security device

A bicycle locking device comprising:

• a housing configured to couple to a bicycle frame, wherein a section of the housing forms a housing arc having a gap, and wherein the gap in the housing arc is wider than a bicycle wheel width;
• a locking ring configured substantially within the housing arc, wherein the housing and the locking ring are configured to move between a first position where the locking ring substantially transects the gap and a second position where the gap is substantially open;
• an electronic actuator component configured to act on the locking ring to move the locking ring from the first position to the second position, and wherein the electronic actuator is configured to receive an indication to move the locking ring to the first position or to the second position;
• a communication electronics component coupled to the electronic actuator component, wherein the communication electronics component is configured to generate an indication to the actuator to move the locking ring into the first position or the second position, wherein the communication electronics component is configured to wirelessly receive from a second device a lock or unlock message, and wherein the communication electronics component is configured to send to the second device an alert indication;
• and
• a sound generation component which is activated responsive to detection of movement of the bicycle to send notification of the detected movement to the second device.