FIELD: bicycle engineering. SUBSTANCE: bicycle has frame 1 with wheels, handlebar 2, saddle 3 first kinematic pair with driving sprocket 4 and driven sprocket 5 coupled by flexible drive member 6, second kinematic pair with double-row sprocket 12 with second row 11 of teeth and sprocket 15 coupled by gearshift flexible member 14. Fitted in second kinematic pair is freewheeling clutch and double-row sprocket 12 through which kinematic pairs are engaged. EFFECT: enlarged operating capabilities. 2 dwg
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