are optimized for track racing; they are fixed-gear bicycles without freewheel or brakes, with narrow tires inflated to high pressure. Frame and other components are designed for rigidity and lightness, to give maximum speed over the distance of the race (sprint or longer). Sprint Sprint races are generally between 3 and 8 laps in length and focus on raw sprinting power and race tactics over a small number of laps to defeat opponents. Sprint riders train specifically to compete in races of this length, and do not generally compete in endurance events. The main sprint events are: Sprint Team sprint Keirin Track time trial Endurance Endurance races are held over longer distances. These races test the riders endurance capacity, as well as tactics and speed. The length of track endurance events varies by race type, whether it is a part of the Omnium or not, and the gender of the competitors. Many track endurance riders also compete in road cycling events. The main endurance events are: Individual pursuit Team pursuit Scratch race Points race Madison Omnium Major competitive events Olympic Games There were six events in track cycling at the Olympics in 2021: team sprint, match sprint, keirin, omnium, team pursuit, and Madison. The Madison was added in the Tokyo 2020 Olympics held in 2021; the other races had been held in previous Games. There are separate races of each type for men and women; until the 2012 Summer Olympics there were fewer events for women. World Championships The UCI Track Cycling World Championships are held every year, usually in March or April at the end of the winter track season. There are currently 20 events in the World Championships, 10 for men and 10 for women. Qualification places are determined by different countries performance during the World Cup Classic series held through the season. World Cup The UCI Track Cycling World Cup series consists of six, held in different countries beginning annually in October, and finishing in January. These meeting include 17 of the 19 events (excluding the omnium for men and women) that take place in a World Championship over three days. Events won and points scored by the riders throughout this series count towards qualification places individually and for their nation in the World Championships at the end of the season. The overall leader in each event may wear a white points leaders jersey at each race,