An internal hub transmission for a bicycle comprises a drive member rotatably supported around a hub axle, a hub body rotatably supported around the hub axle, a planetary gear mechanism disposed in a force transmission path between the drive member and the hub body that communicates rotational force from the drive member to the hub body through a plurality of power transmitting paths, and a clutch member that controls the planetary gear mechanism. A one-way clutch mechanism is disposed in a force transmission path between the drive member and the clutch member.

 
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> Variable height system for supporting the non-driven wheel of a bicycle having a driven wheel engaged with a bicycle trainer

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