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University of Pennsylvania Students Make Bike that Electronically Switches From Fixed to Free

A team of five mechanical engineering students at the University of Pennsylvania have set out to create a bicycle that has an electronically controlled clutch that allows the rider to switch between fixed-gear and freewheeling configurations.

The bicycle, named Aplha, has a fully internal drivechain and custom machined frame that incorporates epoxy carbon fiber, stainless steel and titanium.