All available race results Petrus de Roos
| Date | Race | Rank |
| 27/09 | Amsterdam - Arnhem - Amsterdam | 8 |
Rider information for 1903
| Rank | 198 |
| Score | 16 |
| Name | Petrus DE ROOS |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 17/07 | Amsterdam - Utrecht - Amsterdam | 4 |
Rider information for 1904
| Rank | 146 |
| Score | 26 |
| Name | Petrus DE ROOS |
| Country | Netherlands |
| Team | Individual |