A 21 speed bike has seven gears in the Rear Wheel and three on the tube pedal?
In art it is more difficult to pedal, a subsequent sprocket small or a large crown and why? In art it is more difficult to pedal, a small pinion gear or big? Why Why?
Grande prepares combined front with little gear in the back are more difficult to pedal. This combination gives you much speed, but not much potentially very cool to go downhill. Little is prepared in front combined with the great developments in the back are easier to pedal. That combination gives you plenty of power, but not much speed, you need to climb hills. You can go as fast in many different gear combinations. To maintain a constant speed, if selected gear they need to exert a smaller force of the pedals, then you have to pedal faster than the gears that force you to exercise stronger. There is no free lunch in physics. No free beer, either. HTH
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