A bicycle freewheel is a crucial component that allows the bike to coast without pedaling. It consists of a set of gears and a ratchet mechanism that engages when pedaling forward and disengages when coasting. This means that when a cyclist stops pedaling, the rear wheel can continue to spin freely, allowing for smoother rides and easier navigation downhill. Freewheels are typically found on the rear hub of a bicycle and come in various gear ratios to suit different riding styles. They are often confused with freehubs, which serve a similar purpose but have a different design. Both components enhance the cycling experience by providing flexibility and control.