Bicycle is a human-powered, two-wheeled vehicle designed for transportation, recreation, and sport. Known for its efficiency, simplicity, and eco-friendliness, it remains a popular mode of travel worldwide. Bicycles consist of a frame, handlebars, pedals, wheels, and a chain mechanism that converts rider effort into motion. They come in various types, including road bikes for speed, mountain bikes for rough terrain, and city bikes for urban commuting. Cycling promotes physical fitness, reduces carbon emissions, and eases traffic congestion. Many cities now feature dedicated bike lanes and sharing programs to encourage cycling. Whether for leisurely rides, competitive racing, or daily commutes, bicycles offer a versatile and sustainable way to move, fostering health and environmental benefits for riders and communities alike.