Bicycle transmission device

A bicycle transmission device comprising:

• an input rotational shaft;
• an output part;
• a transmission mechanism including a first rotating body configured to transmit rotation of the input rotational shaft and a fourth rotating body configured to transmit the rotation of the input rotational shaft, the fourth rotating body being different from the first rotating body;
• and
• a switching mechanism configured to selectively switch between a first state in which a ratio of a rotational speed of the output part to a rotational speed of the input rotational shaft is a first ratio and a second state in which the ratio is a second ratio that is different from the first ratio,
• a switching mechanism including:
• a one-way clutch configured to switch between a third state in which rotation is not transmitted from the first rotating body to the output part, and a fourth state in which rotation is transmitted from the first rotating body to the output part;
• and
• a switching unit configured to switch between a fifth state in which rotation is transmitted from the fourth rotating body to the output part, and a sixth state in which rotation is not transmitted from the fourth rotating body to the output part,
• the first state including the third state and the fifth state, the second state including the fourth state and the sixth state.