Five different jerseys were worn during the 1990 Giro d'Italia. The leader of the
general classification – calculated by adding the stage finish times of each rider, and allowing time bonuses for the first three finishers on
mass-start stages – wore a pink jersey. This classification is the most important of the race, and its winner is considered as the winner of the Giro. was the
Cima Coppi for the 1991 running of the Giro d'Italia. For the
points classification, which awarded a purple (or
cyclamen) jersey to its leader, cyclists were given points for finishing a stage in the top 15; additional points could also be won in intermediate sprints. The green jersey was awarded to the
mountains classification leader. In this ranking, points were won by reaching the summit of a climb ahead of other cyclists. Each climb was ranked as either first, second or third category, with more points available for higher category climbs. The
Cima Coppi, the race's highest point of elevation, awarded more points than the other first category climbs.
The Cima Coppi for this Giro was the
Passo Pordoi. It was crossed twice by the riders, for the first climbing of the mountain, Italian
Maurizio Vandelli was the first over the climb, while
Charly Mottet was first over the second passing. The white jersey was worn by the leader of
young rider classification, a ranking decided the same way as the general classification, but considering only neo-professional cyclists (in their first three years of professional racing). The
intergiro classification was marked by a blue jersey. The calculation for the intergiro is similar to that of the general classification, in each stage there is a midway point that the riders pass through a point and where their time is stopped. As the race goes on, their times compiled and the person with the lowest time is the leader of the intergiro classification and wears the blue jersey. Although no jersey was awarded, there was also one classification for the teams, in which the stage finish times of the best three cyclists per team were added; the leading team was the one with the lowest total time. The rows in the following table correspond to the jerseys awarded after that stage was run. ==Final standings==