Rainbow jersey

A world champion must wear the jersey when competing in the same discipline, category and speciality for which the title was won.

[2] 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.

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.

Rainbow jersey colours have been used unofficially by triathlon, speed skating and Crashed Ice world champions.