Stage wins
List of all grand tour stage wins for Zonca.
| # | Date | Grand tour | Stage | Winner |
|---|---|---|---|---|
| 4 | 1979-05-23 | Giro | Stage 6 | Vieste - Chieti | WOLFER Bruno |
| 3 | 1978-05-28 | Giro | Stage 20 | Inverigo - Milano | GAVAZZI Pierino |
| 2 | 1978-05-19 | Giro | Stage 12 | Poggibonsi - Passo del Trebbio | BELLINI Giancarlo |
| 1 | 1973-05-25 | Giro | Stage 6 | Milano - Iseo | MOTTA Gianni |
Summary
| Grand tour | Stagewins | Number of different winners |
|---|---|---|
| Giro | 4 | 4 |