A bicycle rim includes a plurality of recesses defined in an inner periphery thereof and a through hole is defined through the rim and shares a common axis with the recess corresponding thereto. The method and apparatus also determines an estimated motor temperature by measuring the motor resistance or the rotor slip. Nodes and the access point are connected to each other by an uplink channel and a downlink channel. A second object at a different host address and port number creates a message destined for the first object. The present invention may be applied to a fingerprint collation apparatus. The predetermined test criterion includes comparison of at least two values concerning the sender object.