BMX (Bicycle Motocross) is a form of cycling on specially designed bicycles which usually have 16 to 24-inch wheels (the norm being the 20-inch wheel). The bicycle, cycle, or bike is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind Motocross is a form of Motorcycle sport or All-terrain vehicle racing held on enclosed Off road circuits Cycling is the use of Bicycles or - less commonly - Unicycles Tricycles Quadricycles and other similar wheeled Human powered vehicles The sport includes racing on earthen tracks, known as BMX racing, as well as the performance of tricks on the bikes, called Freestyle BMX. Freestyle BMX is a creative way of using bicycles originally designed for bicycle motocross racing
Freestyle BMX has grown to include five distinct disciplines. These are Street, Park, Vert, Dirt, and Flatland. These usually involve technical movements of the bike in different ways over varied terrain.
Recently, BMX racing's international governing body, Union Cycliste Internationale (UCI), began sponsoring the UCI BMX World Championships. Union Cycliste Internationale (UCI is a Cycling association that oversees competitive cycling events internationally UCI BMX World Championships is the World championship for BMX racing (bicycle motorcross cycling sponsored by the Union Cycliste Internationale (UCI In 2008, BMX racing will enter the Olympics for the first time in Beijing, China. The Olympic Games is an international Multi-sport event established for both summer and winter games China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National  (For the schedule, see Cycling at the 2008 Summer Olympics: BMX)
BMX originated in the state of California, United States in the early 1970s, when teenagers imitated their motocross heroes on their bicycles. Cycling competitions at the Beijing 2008 Summer Olympics were held from August 9 to August 23 at the Laoshan Velodrome AST Dew Tour is a balarina sports tour that consists of five major multi-sport events spanning across the country with a cumulative points system a $2 The X Games is an annual event with a focus on extreme action sports California ( is a US state on the West Coast of the United States, along the Pacific Ocean. The United States of America —commonly referred to as the Motocross is a form of Motorcycle sport or All-terrain vehicle racing held on enclosed Off road circuits  Children were racing standard road bikes off-road, around purpose-built tracks in the Netherlands. The Netherlands ( Dutch:, ˈnedərlɑnt is the European part of the Kingdom of the Netherlands, which consists of the Netherlands the Netherlands  The 1971 motorcycle racing documentary On Any Sunday is generally credited with inspiring the movement nationally in the US. On Any Sunday is a 1971 American documentary feature about Motorcycle sport, directed by Bruce Brown. In the opening scene, kids are shown riding their Schwinn Stingrays off-road. The Schwinn Bicycle Company was founded by Ignaz Schwinn in Chicago in 1895 and became the dominant manufacturer of American Bicycles through It was not until the middle of that decade that the sport achieved critical mass, and manufacturers began creating bicycles designed specially for the sport.
The BMX bike has grown very popular with youth and has been known to be practical as it is rather small and easy to move. There are also BMX Style Helmets which are made specially for the sport.
By 1977, the American Bicycle Association (ABA) was organized as a national sanctioning body for the growing sport. The American Bicycle Association (ABA is a United States -based Bicycle Motocross (BMX Sports governing body in Gilbert Arizona created by  BMX was introduced in Europe in 1978. In April 1981, the International BMX Federation was founded, and the first world championships were held in 1982. Since January 1993 BMX has been integrated into the Union Cycliste Internationale. Union Cycliste Internationale (UCI is a Cycling association that oversees competitive cycling events internationally 
Over the last decade, the popularity of BMX has grown immensely. It is now one of the staple events at the annual Summer X Games Extreme Sports competition held largely on both coasts of the United States.