This is not a specific race, but a competition that ties races and events together, and comparable to a heptathlon, decathlon in athletics, or modern pentathlon. Four endurance events comprise the current Olympic and World Championship Omnium: Scratch, Tempo, Elimination and Points race and must be completed within a day. Team Sprint, sprint, Keirin, Kilo and flying laps are generally considered 'sprinters' races, which in track cycling equate to extremely powerful, muscular riders over short distances, resulting in some historic overlap between BMX riders and track sprinters, such as Chris Hoy. The other events are considered endurance events for riders with less outright power but greater aerobic ability, and such events have historically enjoyed an overlap with elite road racers, including road sprinters such as Mark Cavendish and Elia Viviani, Grand Tour legends Eddy Merckx , Fausto Coppi and more recent Tour de France winners Bradley Wiggins and Geraint Thomas. See also Board track racing Cycle track List of cycling tracks and velodromes Outline of bicycles Outline of cycling Cant (road/rail) References External links List of velodromes Track Cycling Sports venues by type Track cycling