1990 Giro d'Italia Classification Leadership Classification leadership by stage

| Stage | Winner | General_classification | Points_classification | Trofeo_Fast_Team |
|---|---|---|---|---|
| 11 | Adriano Baffi | Gianni Bugno | Phil Anderson | Diana-Colnago-Animex |
| 12 | Éric Boyer | Gianni Bugno | Phil Anderson | Carrera Jeans-Vagabond |
| 13 | Mario Cipollini | Gianni Bugno | Phil Anderson | Carrera Jeans-Vagabond |
| 14 | Alan Peiper | Gianni Bugno | Phil Anderson | Carrera Jeans-Vagabond |
| 15 | Éric Boyer | Gianni Bugno | Phil Anderson | Carrera Jeans-Vagabond |
| 16 | Charly Mottet | Gianni Bugno | Phil Anderson | ONCE |
| 17 | Leonardo Sierra | Gianni Bugno | Gianni Bugno | ONCE |
| 18 | Adriano Baffi | Gianni Bugno | Phil Anderson | ONCE |
| 19 | Gianni Bugno | Gianni Bugno | Gianni Bugno | ONCE |
| 20 | Mario Cipollini | Gianni Bugno | Gianni Bugno | ONCE |
| Final | Final | Gianni Bugno | Gianni Bugno | ONCE |