A bicycle wheel is a circular component that allows a bicycle to move smoothly. It consists of a rim, spokes, and a hub. The rim is the outer part that holds the tire, while the spokes connect the rim to the hub, which is the center of the wheel. The design of the wheel helps distribute weight and provides stability during riding. Bicycle wheels come in various sizes and types, depending on the bicycle's purpose. For example, mountain bikes typically have wider wheels for better traction on rough terrain, while road bikes have thinner wheels for speed on paved surfaces. Proper maintenance of the wheels is essential for safe riding.