All available race results Sjefke Jansen
No results available in season 1944.
Rider information for 1944
| Rank | 274 |
| Score | 19 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Individual |
No results available in season 1945.
Rider information for 1945
| Rank | 442 |
| Score | 18 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 28/04 | Maas-Peel Mijnkoers | 11 |
| Vuelta a España | ||
| 07/05 | Stage 1 | 5 |
| 08/05 | Stage 2 | 45 |
| 09/05 | Stage 3 | 16 |
| 10/05 | Stage 4 | 6 |
| 11/05 | Stage 5 | 10 |
| 12/05 | Stage 6 | 15 |
| 13/05 | Stage 7 | 11 |
| 14/05 | Stage 8 | 7 |
| 15/05 | Stage 9 | 13 |
| 16/05 | Stage 10 | 37 |
| Tour de Luxembourg | ||
| 14/06 | General Classification | 14 |
Rider information for 1946
| Rank | 354 |
| Score | 66 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Bloc Centauro |
| Date | Race | Rank |
| 08/06 | Maas-Peel Mijnkoers | 7 |
| Zesprovincieënronde | ||
| 15/06 | Stage 2b | 2 |
| 15/06 | General Classification | 9 |
| Tour de France | ||
| 25/06 | Stage 1 | 47 |
| 26/06 | Stage 2 | 29 |
| 27/06 | Stage 3 | 53 |
| 28/06 | Stage 4 | 46 |
| 29/06 | Stage 5 | 68 |
| 30/06 | Stage 6 | 22 |
| 02/07 | Stage 7 | 42 |
| 03/07 | Stage 8 | 20 |
| 05/07 | Stage 9 | 46 |
| 06/07 | Stage 10 | 14 |
| 07/07 | Stage 11 | 52 |
| 08/07 | Stage 12 | 21 |
| 10/07 | Stage 13 | 52 |
| 11/07 | Stage 14 | 27 |
| 13/07 | Stage 15 | 16 |
| 14/07 | Stage 16 | 24 |
| 15/07 | Stage 17 | 20 |
| 16/07 | Stage 18 | 30 |
| 17/07 | Stage 19 | 39 |
| 18/07 | Stage 20 | 12 |
| 19/07 | Stage 21 | 41 |
| General Classification | 32 | |
| 03/08 | World Championships Road Race | 3 |
Rider information for 1947
| Rank | 80 |
| Score | 584 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Magneet |
| Date | Race | Rank |
| Ronde van Nederland | ||
| 25/04 | Stage 2 | 4 |
| General Classification | 21 | |
| Tour de Romandie | ||
| 06/05 | Stage 1b | 2 |
| 09/05 | General Classification | 6 |
| 30/05 | Vier Kantone-Rundfahrt | 6 |
| Tour de Luxembourg | ||
| 04/06 | Stage 2 | 6 |
| 06/06 | General Classification | 9 |
| Tour de France | ||
| 30/06 | Stage 1 | 43 |
| 01/07 | Stage 2 | 68 |
| 02/07 | Stage 3 | 21 |
| 03/07 | Stage 4 | 18 |
| 04/07 | Stage 5 | 94 |
| 05/07 | Stage 6 | 61 |
| 06/07 | Stage 7 | 33 |
| 08/07 | Stage 8 | 51 |
| 10/07 | Stage 9 | 17 |
| 11/07 | Stage 10 | 23 |
| 12/07 | Stage 11 | 12 |
| 13/07 | Stage 12 | 20 |
| 15/07 | Stage 13 | 55 |
| 16/07 | Stage 14 | 42 |
| 18/07 | Stage 15 | 35 |
| 19/07 | Stage 16 | 27 |
| 20/07 | Stage 17 | 33 |
| 21/07 | Stage 18 | 12 |
| 23/07 | Stage 19 | 18 |
| 24/07 | Stage 20 | 10 |
| 25/07 | Stage 21 | 29 |
| General Classification | 36 | |
| 05/09 | Maas-Peel Mijnkoers | 1 |
Rider information for 1948
| Rank | 69 |
| Score | 667 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Magneet |
| Date | Race | Rank |
| Ronde van Nederland | ||
| 11/05 | Stage 6 | 2 |
| 15/05 | General Classification | 27 |
| Tour de Luxembourg | ||
| 25/05 | Stage 1 | 8 |
| 26/05 | Stage 2 | 7 |
| 29/05 | Stage 5a | 7 |
| 29/05 | Stage 5b | 7 |
| 29/05 | General Classification | 5 |
| 21/08 | World Championships Road Race | 20 |
Rider information for 1949
| Rank | 186 |
| Score | 264 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Magneet - TWC Maastricht |
| Date | Race | Rank |
| 23/04 | Liège - Bastogne - Liège | 24 |
| Tour de France | ||
| 13/07 | Stage 1 | 94 |
| 14/07 | Stage 2 | 66 |
| 15/07 | Stage 3 | 83 |
| 16/07 | Stage 4 | 113 |
Rider information for 1950
| Rank | 352 |
| Score | 130 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Terrot - Wolber - Hutchinson |
| Date | Race | Rank |
| Ronde van Nederland | ||
| 05/06 | Stage 1 | 9 |
| 10/06 | General Classification | 20 |
Rider information for 1951
| Rank | 440 |
| Score | 60 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Ceylon - Joco - Pontiac |
| Date | Race | Rank |
| 14/04 | Elfstedenronde | 23 |
| Ronde van Nederland | ||
| 03/06 | Stage 2 | 9 |
| 04/06 | Stage 3 | 4 |
| 05/06 | Stage 4a | 10 |
| 08/06 | Stage 7 | 8 |
| 08/06 | General Classification | 6 |
| Deutschlandrundfahrt | ||
| 19/08 | General Classification | 23 |
Rider information for 1952
| Rank | 202 |
| Score | 217 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Venz |
| Date | Race | Rank |
| 26/04 | Meisterschaft von Zürich | 8 |
| 02/05 | La Flèche Wallonne | 14 |
| Tour de Luxembourg | ||
| 29/05 | Stage 1 | 8 |
| 01/06 | General Classification | 13 |
| Tour de France | ||
| 03/07 | Stage 1 | 26 |
| 04/07 | Stage 2 | 43 |
| 05/07 | Stage 3 | 78 |
| 06/07 | Stage 4 | 13 |
| 07/07 | Stage 5 | 13 |
| 08/07 | Stage 6 | 15 |
Rider information for 1953
| Rank | 170 |
| Score | 260 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Locomotief - Remington - Pontiac |
| Date | Race | Rank |
| Ronde van Nederland | ||
| 02/05 | General Classification | 16 |
Rider information for 1954
| Rank | 447 |
| Score | 56 |
| Name | Sjefke JANSEN |
| Country | Netherlands |
| Team | Locomotief - Vredestein |