An omnium (from Latin: of all, belonging to all) is a multiple race event in track cycling. Historically the omnium has had a variety of formats. In recent years, road racing has also adopted the term to describe multi-day races that feature the three primary road race events (time trial, mass start and criterium).
The omnium was re-introduced into the World Championships as a five race format for men in 2007 and for women in 2009. The omnium was changed in 2010 by the UCI to include the elimination race and the distances of the events were lengthened to favour endurance cyclists.
The omnium replaced the individual pursuit, the points race, and the Madison at the Summer Olympic Games beginning in 2012. The change received some criticism from cyclist Rebecca Romero, who was left unable to defend her Olympic title.
Effective June 20, 2014, the omnium as defined by the Union Cycliste Internationale (UCI) consisted of the following six events held over 2 days:
For the first five events, each winner was awarded 40 points, each second place 38 points, each third place 36, etc. Riders ranked 21st and below will each be awarded 1 point. In the Points Race, riders add to and lose points from their totals based on laps gained and lost, and points won in sprints.
In 2016, the three timed events - the sprint time trial, flying lap and individual pursuit were all removed from the event, a tempo race added, and the event shortened to a single day. The points race as final race format remains with minor modifications.
The winner of the Omnium is the rider who has obtained the highest total of points.
In the event of a tie in the final ranking, the places in the final sprint of the last event, the Points Race, breaks the tie.