The rainbow jersey is the distinctive

jersey Jersey ( ; ), officially the Bailiwick of Jersey, is an autonomous and self-governing island territory of the British Islands. Although as a British Crown Dependency it is not a sovereign state, it has its own distinguishing civil and gov ...

worn by the reigning world champion in a cycling discipline, since 1927. The jersey is predominantly white with five horizontal bands in the UCI colours around the chest. From the bottom up the colours are: green, yellow, black, red and blue; the same colours that appear in the rings on the

Olympic flag The International Olympic Committee (IOC) uses icons, flags, and symbols to represent and enhance the Olympic Games. These symbols include those commonly used during Olympic competitions such as the flame, fanfare, and theme as well as those u ...

. The tradition is applied to all disciplines, including

road racing Road racing is a North American term to describe motorsport racing held on a paved road surface. The races can be held on a race track, closed circuit—generally, a purpose-built racing facility—or on a street circuit that uses temporarily c ...

, track racing,

cyclo-cross Cyclo-cross (cyclocross, CX, cyclo-X or cross) is a form of bicycle racing. Races typically take place in the autumn and winter (the international or "World Cup" season is October–February), and consist of many laps of a short (2.5–3.5&nb ...

BMX BMX, an abbreviation for bicycle motocross or bike motocross, is a cycle sport performed on BMX bikes, either in competitive BMX racing or freestyle BMX, or else in general street or off-road recreation. History BMX began during the ea ...

, Trials and the disciplines within

mountain biking Mountain biking (MTB) is a sport of riding bicycles off-road, often over rough terrain, usually using specially designed mountain bikes. Mountain bikes share similarities with other bikes but incorporate features designed to enhance durability ...

. A world champion must wear the jersey when competing in the same discipline, category and speciality for which the title was won. For example, the world road race champion would wear the garment while competing in stage races (except for

time trial In many racing sports, an sportsperson, athlete (or occasionally a team of athletes) will compete in a time trial (TT) against the clock to secure the fastest time. The format of a time trial can vary, but usually follow a format where each athle ...

stages) and one-day races, but would not be entitled to wear it during time trials. Similarly, on the track, the world

individual pursuit The individual pursuit is a track cycling event where two cyclists begin the race from a stationary position on opposite sides of the track. It is held at over for men and women. The riders start at the same time and set off to complete the rac ...

champion would only wear the jersey when competing in other individual pursuit events. In team events, such as the

team pursuit The team pursuit is a track cycling event similar to the individual pursuit, except that two teams, each of up to four riders, compete, starting on opposite sides of the velodrome. Race format Both men's and women's events are competed over ...

, each member of the team must wear the rainbow jersey, but would not wear it while racing in, say,

points race A points race is a mass start track cycling event involving large numbers of riders simultaneously on track. It was an Olympic event for men from 1984 to 2008 and for women from 1996 to 2008. Since 2012, the points race has been one of the omniu ...

s or other track disciplines. If the holder of a rainbow jersey becomes leader of a stage race or a category within it, that leadership jersey takes precedence. Failure to wear the rainbow jersey where required carries a penalty of a fine. After the end of a rider's time as champion, they are eligible to wear piping in the same rainbow pattern on the collar and cuffs of their jersey for the remainder of their career.

Reigning world champions

The reigning world champions (elite only) are as follows:

Curse of the rainbow jersey

The curse of the rainbow jersey is a popular term to refer to the phenomenon where cyclists who have become World Champion often suffer from poor luck the next year – though, in some cases, the 'bad luck' was brought on by their own actions. In 2015 an article by

epidemiologist Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population, and application of this knowledge to prevent diseases. It is a cornerstone ...

Thomas Perneger examining the curse was published in ''

The BMJ ''The BMJ'' is a fortnightly peer-reviewed medical journal, published by BMJ Publishing Group Ltd, which in turn is wholly-owned by the British Medical Association (BMA). ''The BMJ'' has editorial freedom from the BMA. It is one of the world ...

''. The study was based on statistical analysis of the results of World Road Champions and winners of the

Giro di Lombardia The Giro di Lombardia (), officially ''Il Lombardia'', is a cycling race in Lombardy, Italy. It is traditionally the last of the five 'Cycling monument, Monuments' of the season, considered to be one of the most prestigious one-day events in cycli ...

(which was used as a comparison) in the riders' winning seasons and for the two years afterwards (to enable comparison of results before, during and after the supposed curse was in effect). The patterns of data were compared to four statistical models: the "spotlight effect", based on the theory that the apparent curse is due to increased public attention on the World Champion rather than a decline in success; the "marked man" hypothesis, which stipulates that the current wearer of the jersey is more closely marked by rivals during their year as champion; the "

regression to the mean Regression or regressions may refer to: Arts and entertainment * ''Regression'' (film), a 2015 horror film by Alejandro Amenábar, starring Ethan Hawke and Emma Watson * ''Regression'' (magazine), an Australian punk rock fanzine (1982–1984) * ...

" model, which supposes that random variation in success rates will mean that a highly successful season for a rider is likely to be followed by less successful years; and a model combining the last two theories. The study found that the regression to the mean model was the one that fit the data best, for winners of both the World Championship and Il Lombardia, concluding that the curse probably does not exist. The author related the idea of the curse to medical professionals conflating correlation with causation when considering the effect of treatment on a patient.

Designs

In the past, each discipline had its own variation of the jersey. Since the 2016 Cyclo-cross Worlds, the 'classic' jersey without symbols (previously reserved for the road race and paracycling road race) was assigned to all disciplines.

World Cup version

The

UCI Road World Cup The UCI Road World Cup was a season-long Road bicycle racing, road cycling competition held from 1989 until 2004 and comprising ten one-day events. The World Cup was made up of around ten Road bicycle racing, one-day races chosen from the prest ...

(1989–2004) leader wore a rainbow jersey with a vertical rainbow. While the world champion wore the jersey in all events of the year in the specialization of his world title (the road champion wore it only in mass start road events, not, for example, in time trials or in track events), the World Cup leader wore it only in World Cup races. Jersey worldcup

Other sports

Rainbow jersey colours have been used unofficially by

triathlon A triathlon is an endurance multisport race consisting of Swimming (sport), swimming, Cycle sport, cycling, and running over various distances. Triathletes compete for fastest overall completion time, racing each segment sequentially with the ...

speed skating Speed skating is a competitive form of ice skating in which the competitors race each other in travelling a certain distance on skates. Types of speed skating are long-track speed skating, short-track speed skating, and marathon speed skat ...

and Crashed Ice world champions.

Notes and references