Copenhagen wheel converts bikes to human-electric hybrids

Like to ride your bike but need a little boost on those steep hills?  Check out this new “Copenhagen” wheel that snaps onto the real wheel of most bikes to convert them into human-electric-powered hybrids.

Assaf Biderman, founder of Cambridge-based startup Superpedestrian, discovered that in order to increase bicycle ridership, he had to literally reinvent the wheel.

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