Info
| Last name | De Keyser |
| First name | Constant |
| Nationality |  Belgium |
| Date of birth | 20-02-1935 |
| Place of birth | Rillaar |
| Passed away | 09-05-2016 |
| Age when passed away | 81 |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Vuelta a España (2.HC) | |||||||
| 31 |  Standings | ||||||
| 14-05 | Stage 16Bilbao - Bilbao (159.0km) | ||||||
| 23-04 | 58 | Paris - Brussel (1.1) | |||||
| 04-03 | 24 | Omloop Het Volk (1.1) | |||||
Teams
Victories
| This year | 0 |
| Total | 0 |