A locking device includes a lock body configured to be secured to a part of a bicycle, a cable within the lock body and having a first end accessible from an exterior of the lock body, a spring coil mechanism within the lock body for coiling the cable within the lock body and enabling the cable to be selectively extended from the lock body to lock the bicycle to a separate structure by wrapping the cable around the separate structure and then locking the first end of the cable to the lock body, and a communication and control unit incorporated into the lock body and configured to communicate with a remote device to allow the remote device to wirelessly unlock the first end of the cable from the lock body.