A BMX bike is a type of bicycle designed for performing tricks, racing, and riding on rough terrain. The acronym "BMX" stands for "Bicycle Motocross," which originated from racing on dirt tracks. These bikes typically have a lightweight frame, 20-inch wheels, and a single gear, making them agile and easy to maneuver. BMX bikes are popular among riders of all ages and are often used in skate parks, dirt jumps, and flatland tricks. They come in various styles, including freestyle and racing models, catering to different riding preferences. Many riders participate in competitions, showcasing their skills in events like the X Games and the Olympics.