A bicycle is a two-wheeled vehicle that people use for transportation, exercise, and fun. It consists of a frame, handlebars, pedals, and a seat. Riders propel the bicycle forward by pedaling, which turns the wheels. Bicycles are popular because they are eco-friendly and can be used on roads and bike paths. Many people enjoy cycling as a hobby or sport. There are different types of bicycles, such as mountain bikes for rough terrain and road bikes for smooth surfaces. Riding a bicycle can improve fitness and is a great way to explore your surroundings while enjoying the outdoors.