All available race results Jean Claessens
Rider information for 1938
| Rank | 670 |
| Score | 18 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 01/07 | Bruxelles - Luxembourg - Mondorf | 8 |
Rider information for 1939
| Rank | 870 |
| Score | 9 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| Circuit de Belgique | ||
| 17/08 | General Classification | 8 |
Rider information for 1941
| Rank | 375 |
| Score | 26 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 01/05 | Grote 1 Mei-Prijs Hoboken | 21 |
| Circuit de Belgique | ||
| 17/05 | General Classification | 5 |
| 29/06 | Ronde van Limburg | 6 |
Rider information for 1942
| Rank | 226 |
| Score | 62 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 19/04 | Ronde van Vlaanderen | 33 |
| 25/07 | Scheldeprijs - Schoten | 24 |
Rider information for 1943
| Rank | 393 |
| Score | 20 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Helyett - Hutchinson |
| Date | Race | Rank |
| 14/05 | La Flèche Wallonne | 10 |
Rider information for 1944
| Rank | 100 |
| Score | 105 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 29/04 | Brussel - Brugge | 16 |
| 16/09 | G.P. des Nations | 10 |
Rider information for 1945
| Rank | 371 |
| Score | 28 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 12/05 | Ronde van Limburg | 19 |
| Tour de Belgique | ||
| 16/05 | Stage 1 | 53 |
| 17/05 | Stage 2 | 23 |
| 18/05 | Stage 3 | 36 |
| 20/05 | Stage 4 | 21 |
| 21/05 | Stage 5 | 25 |
| 22/05 | Stage 6 | 7 |
| 24/05 | Stage 7 | 15 |
| 25/05 | Stage 8a | 16 |
| 25/05 | Stage 8b | 19 |
| 26/05 | General Classification | 11 |
Rider information for 1946
| Rank | 214 |
| Score | 180 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Bertin - Carpriaux Sport - Wolber |
| Date | Race | Rank |
| 27/04 | Ronde van Vlaanderen | 27 |
| Tour de Belgique | ||
| 14/05 | Stage 2 | 13 |
| 15/05 | Stage 3 | 24 |
| 16/05 | Stage 4 | 14 |
| 17/05 | Stage 5 | 29 |
Rider information for 1947
| Rank | 484 |
| Score | 52 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Bertin - Wolber |
No results available in season 1948.
Rider information for 1948
| Rank | 1263 |
| Score | 0 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Bertin - Wolber |
No results available in season 1949.
Rider information for 1949
| Rank | 768 |
| Score | 21 |
| Name | Jean CLAESSENS |
| Country | Belgium |
| Team | Individual |