Modern bicycles leave nothing to be desired. 21, 24, 27 gears! For many amateur cyclists, such luxury is too much of a good thing. They change gear too infrequently and too late, get out of breath and don’t enjoy the ride. At the Hannover Messe (April 21 through 25), Fraunhofer researchers are presenting a bicycle with an intelligent pedal crank that helps the biker to direct his strength into the pedals.