Bicycles consist of several key parts that work together to ensure smooth operation. The main components include the frame, which provides the structure; the wheels, which allow for movement; and the handlebars, which help steer the bike. Other important parts are the brakes, which slow down or stop the bike, and the gears, which help adjust the bike's speed and ease of pedaling. Additionally, the chain connects the pedals to the rear wheel, transferring power from the rider. The seat offers comfort during rides, while the tires provide traction and stability on various surfaces. Each part plays a crucial role in the overall performance of the bicycle.