All available race results Klaas de Gruyter
| Date | Race | Rank |
| 17/03 | Nokere Koerse | 107 |
| 03/04 | Hel van het Mergelland | 36 |
| 05/09 | G.P. Jef Scherens - Leuven | 35 |
| 30/09 | Omloop van het Houtland Lichtervelde | 77 |
Rider information for 2004
| Rank | 2217 |
| Score | 1 |
| Name | Klaas DE GRUYTER |
| Country | Belgium |
| Team | Jartazi - Granville Team |
| Date | Race | Rank |
| Vuelta a Burgos | ||
| 07/08 | Stage 1 | 64 |
| 08/08 | Stage 2 | 44 |
| 09/08 | Stage 3 | 82 |
| 10/08 | Stage 4 | 60 |
| 11/08 | Stage 5 | 57 |
| General Classification | 67 | |
| Tour du Poitou Charentes et de la Vienne | ||
| 23/08 | Stage 1 | 65 |
| 24/08 | Stage 2 | 68 |
| 25/08 | Stage 3 | 56 |
| 26/08 | Stage 4a | 75 |
| 26/08 | Stage 4b | 59 |
| General Classification | 65 | |
| 16/09 | Kampioenschap van Vlaanderen - Koolskamp | 29 |
Rider information for 2005
| Rank | 1779 |
| Score | 5 |
| Name | Klaas DE GRUYTER |
| Country | Belgium |
| Team | MrBookmaker - Sports Tech |
| Date | Race | Rank |
| 01/05 | Grote Prijs 1 Mei - Ereprijs Victor de Bruyne | 63 |
| 23/08 | Druivenkoers - Overijse | 42 |
| 29/08 | Schaal Sels | 39 |
| 03/09 | G.P. Jef Scherens - Leuven | 30 |
Rider information for 2006
| Rank | 2055 |
| Score | 4 |
| Name | Klaas DE GRUYTER |
| Country | Belgium |
| Team | Palmans Collstrop |
| Date | Race | Rank |
| Driedaagse van West-Vlaanderen | ||
| 09/03 | Stage 1 | 97 |
| 10/03 | Stage 2 | 124 |
| 07/04 | Hel van het Mergelland | 49 |
| 12/04 | G.P. Pino Cerami | 62 |
| 21/08 | G.P. Stad Zottegem | 78 |
Rider information for 2007
| Rank | 3894 |
| Score | 0 |
| Name | Klaas DE GRUYTER |
| Country | Belgium |
| Team | Palmans Collstrop |