Info
| Last name | Demarbaix |
| First name | Sebastien |
| Nationality |  Belgium |
| Date of birth | 19-12-1973 |
| Age | 52 |
| Place of birth | Lessines |
About Sebastien Demarbaix
Sebastien Demarbaix is a Belgian professional cyclist, 52 years old. Turned professional in 1996. Active in road cycling.
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 21-10 | DNF |  Giro di Lombardia (CDM) | |||||
 Tour de France (GT) | |||||||
| 88 |  Standings | ||||||
| 23-07 | Stage 21Paris - Paris (138.0km) | ||||||
| 01-07 | 154 | Stage 1Futuroscope - Futuroscope (16.0km) | |||||
| Route du Sud (2.3) | |||||||
| 4 | Standings | ||||||
| 20-06 | 6 | Stage 4Saint-Gaudens - Peyragudes (147.0km) | |||||
| Critérium du Dauphiné Libéré (2.HC) | |||||||
| 09-06 | 8 | Stage 5Beaumes-de-Venise - Digne-les-Bains (201.0km) | |||||
| 08-06 | 10 | Stage 4Romans-sur-Isèr - Mont Ventoux (159.0km) | |||||
| 01-05 | 45 |  Rund um den Henninger Turm (1.1) | |||||
| 16-04 | 75 | Liège-Bastogne-Liège (CDM) | |||||
| 12-04 | 23 | La Flèche Wallonne (1.HC) | |||||