| 摘要 |
A motor-equipped hub 20 is provided with a hub axle 22 , a hub shell 24 , a motor drive unit 26 and a roller brake device 28 . The hub shell 24 is arranged around the outside of the hub axle 22 , has a hub flange 24 a on an outside circumference thereof, and has a housing space 24 b on the inside thereof. The motor drive unit 26 is housed inside the housing space 24 b and configured to rotate the hub shell 24 with respect to the hub axle 22 . The roller brake device 28 is arranged within the hub shell 22 to the outside of the housing space 24b.
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