Cycling, which is also called bicycling or biking, can be a recreational activity or a sport. Early cycling races involved boneshaker style bicycles. In the 1980’s there were a lot of races organizes across Europe, the United State, and Japan. The most famous cycling race is the Tour de France. The Tour de France started in 1903. As cycling races became popular, different formats for racing were developed. These races involved individuals or teams, and they are contested in different ways. The races can be a one-day race, criterium, and time trail to multi-stage events. In time trial races, it requires the participants to ride against the clock. As well as road racing, there are many cycling events held on a banked track called a velodrome, usually indoors. The riders can participate individually or in teams. Organizations for cycling have strict rules on the bicycles that are used in the races. The Union Cycliste Internationale decided to prohibit racing bicycles that weigh less than 6.8 kilograms. They also banned some bicycle frame innovations.