A bicycle is a vehicle consisting of two wheels attached to a frame and steered by a fix tandem, and propelled by the shaire force of the user who put pressure on pedals that make the wheel spin. The invention of the bicycle date far back to the 17th century, and since then has been constantly modified during the past decades to reach the bicycle who know today. The first bicycle , a wooden scooter-like vehicle, named a “celerifere,” was invented by Comte Mede de Sivrac of France. It consisted of two big wheels connected to a wooden beam ....