Isn't this a hoax? The only way I can see for it to work is if there's another wheel spinning backwards underneath the rider that is touching and propelling the back tire. But that seems like an extremely energy inefficient design.
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Isn't this a hoax? The only way I can see for it to work is if there's another wheel spinning backwards underneath the rider that is touching and propelling the back tire. But that seems like an extremely energy inefficient design.
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