RE: This Bike Can Go 144km/h (89mph) ONLY With Muscle Strength!

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This Bike Can Go 144km/h (89mph) ONLY With Muscle Strength!

in sirwinchester •  8 years ago 

In it's basic form the bicycle is already the most efficient use of human energy for travel, it's not surprising they were able to really maximize that potential with this design. Incredible.

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That is rad!!