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COOL HUNTING

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Combining bicycle safety and a sense of whimsy, Contrail is a tool that sends a colorful message to the mobile community. The small apparatus attaches to any bike's seat tube and applies a thin layer of chalk powder in one of several colors to the rear tire.

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The result is an eye-catching streak that traces wherever you ride. In addition to visually enhancing the street, it serves as a directional guide for subsequent cyclists and a constant reminder to motorists that they should share the road.

Developed by Brooklyn-based Studio Gelardi, Contrail was created as part of last year's Design21 "Power to the Pedal" Design Competition, where it was a finalist.

Find out more about Contrail and Studio Gelardi's other designs on their website.

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