@DavidBrin tweets related to: Bicycles, Concept, Rider, Future

Future Bikes: 10 Bold, Brilliant Bicycle Concepts Custom Bicycle Concepts | Throughout its lifetime of over a thousand years, the bicycle formula hasn't changed much- a pair of wheels, a seat, a frame and pedals.
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Bicycles of the Future: Bold, sleek concepts for the modern urban rider http://t.co/fqXluf2cts

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