Info
| Last name | Fontanelli |
| First name | Sigfrido |
| Nationality |  Italy |
| Date of birth | 01-10-1947 |
| Place of birth | Pulica di Montelupo |
| Passed away | 20-02-2004 |
| Age when passed away | 56 |
| Place of passing | Lastra a Signa |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Tour de Suisse (2.1) | |||||||
| 14-06 | 4 | Stage 3Bazenheid - Arosa (144.0km) | |||||
| 13-06 | 4 | Stage 2Liestal - Bazenheid (160.0km) | |||||
| Giro d'Italia (2.HC) | |||||||
| 51 |  Standings | ||||||
| 07-06 | Stage 20Dobbiaco - Bolzano (155.0km) | ||||||
| 02-06 | 10 | Stage 15Casciana Terme - Mirandola (215.0km) | |||||
Teams
| Year | Team |
|---|---|
| 1978 | Magniflex - Torpado(until 15-05) |
| 1977 | Magniflex - Torpado |
| 1976 | Sanson |
| 1975 | Filotex |
| 1974 | Sammontana |
| 1973 | Sammontana |
| 1972 |  Van Cauter - Magniflex - de Gribaldy |
| 1971 | Hertekamp - Magniflex |
| 1970 | Hertekamp - Magniflex |
| 1969 | Molteni |
Victories
| This year | 0 |
| Total | 3 |