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 | |||||
|---|---|---|---|---|---|---|---|
| 11-09 | 3 | Giro del Veneto (1.1) | |||||
| 28-08 | 9 | Giro del Lazio (1.HC) | |||||
| 04-08 | 16 | Coppa Sabatini (1.4) | |||||
| Giro d'Italia (2.HC) | |||||||
| 45 |  Standings | ||||||
| 12-06 | Stage 22bMilano - Milano (106.0km) | ||||||
| 01-06 | 1 | Stage 12Gabicce Mare - Porretta Terme (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 |