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A bicycle built for two.

A bicycle built for you

A wearying haul up that long hill -- panting, perspiring. No one wants to be a pedal pusher on a bike in the wrong gear.

What if a bicycle could handle all that gear shifting for you?

Ezra Gold, a mechanical engineer at the University of Rochester (N.Y.), and his coworkers have built a "smart" bike that indeed shifts gears automatically. Taking cues from the rider and the terrain, a special computer chip measures how fast the cyclist is pedaling, how fast the wheels are going, and how taut the chain is.

The computer gets to know the cyclist's habits -- how fast he or she likes to pedal -- and puts the bike into the best gear.
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Title Annotation:bicycle shifts automatically
Publication:Science News
Article Type:Brief Article
Date:Mar 25, 1995
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