"... Three Purdue University industrial designers who tapped
into memories of their own childhood cycling misadventures have built a
bike that ditches the training wheels but keeps rookies stable.
Called SHIFT, it slowly transforms from a tricycle to bicycle
configuration as the rider pedals faster, then returns to trike formation
as the rider slows down. ..."
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Bob Parnass, AJ9S GNU/Linux User http://parnass.com