All available race results J.W. de Wolf
| Date | Race | Rank |
| 22/03 | Den Haag - Brussel | 3 |
Rider information for 1926
| Rank | 567 |
| Score | 24 |
| Name | J.W. DE WOLF |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 27/03 | Den Haag - Brussel | 9 |
Rider information for 1927
| Rank | 1014 |
| Score | 6 |
| Name | J.W. DE WOLF |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 27/06 | Nederlands Kampioenschap (ITT) | 2 |
Rider information for 1932
| Rank | 1834 |
| Score | 0 |
| Name | J.W. DE WOLF |
| Country | Netherlands |
| Team | Individual |