Shimano Inc.

Shintarou Mori

Toshio Tetsuka

Fumiaki Yoshida

Michihiro Kodama

A bicycle crank assembly comprises a crank axle, a first crank arm, and a battery holding structure. The crank axle comprises a cavity and a first end portion. A battery unit is to be provided in the cavity. The first end portion has a first end opening which is in communication with the cavity. The first crank arm is configured to be mounted on the first end portion. The battery holding structure is configured to hold the battery unit in the cavity. The battery holding structure is configured so that the battery unit is replaceable through the first end opening in a state where the first crank arm is mounted on the first end portion of the crank axle.

Bicycle crank assembly

A bicycle pedaling force detector is basically provided with that basically includes a first sensor circuit, a wireless communicator and a first electrical connection member. The first sensor circuit is coupled to a first housing that is configured to be mounted to a crank assembly. The wireless communicator is coupled to a second housing that is configured to be detachably mounted to a crank assembly. The second housing is a separate member from the first housing. The first electrical connection member is configured to electrically connect the wireless communicator and the first sensor circuit.

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Sakai, Japan

Shintarou Mori