A bicycle freewheel is a crucial component of a bike's drivetrain that allows the rear wheel to rotate freely when the rider stops pedaling. This mechanism enables the cyclist to coast without pedaling, making it easier to navigate downhill or maintain speed without continuous effort. The freewheel consists of a set of pawls and a ratchet mechanism that engages when pedaling forward and disengages when coasting. The freewheel is typically found on mountain bikes, road bikes, and other types of bicycles. It is often confused with the freehub, which serves a similar purpose but is integrated into the rear hub. Both systems enhance the riding experience by providing flexibility and efficiency in pedaling.