Electronically switchable chainless drivetrain developed for Alpha Bike concept

The Alpha Bike is an interesting prototype out of the University of Pennsylvania featuring a fully internal chainless drive that can be switched between fixed gear drive and freewheel electronically. Fabricated entirely in-house, the bike's drivetrain, brake systems and onboard electronics are all concealed inside the custom-machined frame and an LCD display on the handlebars updates the rider on important journey information. Oh, and it looks pretty good too...

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