All available race results Cas Kleefstra
| Date | Race | Rank |
| 31/08 | World Championships Road Race (Amateurs) | 11 |
Rider information for 1946
| Rank | 502 |
| Score | 34 |
| Name | Cas KLEEFSTRA |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 31/08 | World Championships Road Race (Amateurs) | 11 |
| Rank | 502 |
| Score | 34 |
| Name | Cas KLEEFSTRA |
| Country | Netherlands |
| Team | Individual |