/kloc-in the 1970s, children in California, USA, rode ordinary bicycles on specially built cross-country runways, imitating the cross-country motorcyclists they admired. Cross-country cycling originated here. 197 1 The opening scene of the documentary "On any Sunday" about motorcycle racing is a group of children riding Shi Wen's 20-inch Stringrays bike all over the country. This film aims to encourage this movement in America. In the mid-1970s, manufacturers began to design and produce special bicycles for this sport.

1977, the American Cycling Association (ABA) was established specifically for the growing BMX movement. 1981April, the international BMX Federation was established, and the first world championship was held the following year. From 1993 to 1, BMX officially entered the International Cycling Union.

Today, BMX has become one of the main events in the annual summer extreme sports competition in the United States. In 2008 Beijing Olympic Games, BMX became one of the official events.