All available race results Karel Hamelink
| Date | Race | Rank |
| Ronde van Nederland | ||
| 09/05 | Stage 4 | 5 |
| 11/05 | Stage 6a | 9 |
| 11/05 | Stage 6b | 10 |
| 13/05 | General Classification | 27 |
Rider information for 1957
| Rank | 346 |
| Score | 105 |
| Name | Karel HAMELINK |
| Country | Netherlands |
| Team | Magneet - Vredestein |