BMX, or bicycle motocross, is a competitive sport involving the racing of BMX bicycles on a dirt course with possible obstacles. BMX competitions were first organized and held in 1970, and have since become a major event for bicyclist and motocross racing enthusiasts. A bicycle used for BMX racing events differs from a conventional bike, as most BMX bikes are equipped with a shorter tube on the frame, made from chrome steel to stay lightweight, and typically have more advanced shocks for maneuvering. Most BMX Competitions and dirt tracks have room for up to 8 racers, allowing space for any inevitable falls.