Slideshow: High-Tech Pedal Power

They used to be called bicycles; now they are HPVs, or human-powered vehicles. Recumbent "bullet" bikes achieve speeds of over 80 mph with aerodynamic design and super-athletic riders. By Bryan Ball.
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Sam Whittingham pilots the Varna Diablo through the traps on highway 305 in Battle Mountain, Nevada.

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Matt Weaver's Cutting Edge II during wind tunnel testing.
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The M5 Number 8 is prepared for a run at Battle Mountain.
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Warren Beauchamp's Cuda-W at speed.