FIELD: vehicles. SUBSTANCE: device has saddle 2 installed on frame 1, hind wheel 5 has smaller driven sprocket 6 wrapped by endless chain 7, thrown over first driving sprocket 8, 300 mm in diameter, provided with two connecting rods with pedals 9. The other driving sprocket 10, 150 mm in diameter, is introduced to chain 7 from above, from the outside, and is rigidly connected with two connecting rods with pedals 11. EFFECT: facilitated use. 1 dwg
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