Info
| Last name | Karstens |
| First name | Gerben |
| Nationality |  Netherlands |
| Date of birth | 14-01-1942 |
| Place of birth | Leiden |
| Passed away | 08-10-2022 |
| Age when passed away | 80 |
| Place of passing | Dongen |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 06-10 | 12 |  Paris - Tours (1.1) | |||||
| 21-09 | 12 | Amstel Gold Race (1.1) | |||||
| 30-03 | 27 |  Ronde van Vlaanderen (CDM) | |||||
| 23-03 | 6 | E3 Prijs Harelbeke (1.1) | |||||
| 19-03 | 11 |  Milano-Sanremo (CDM) | |||||
| Paris - Nice (2.1) | |||||||
| 39 |  Standings | ||||||
| 15-03 | Stage 8bAntibes - Nice (29.0km) | ||||||
| 10-03 | 9 | Stage 3Nevers - Marcigny (185.0km) | |||||
Teams
| Year | Team |
|---|---|
| 1978 | Ti-Raleigh - Mc Gregor |
| 1977 | Ti-Raleigh |
| 1976 | Ti-Raleigh - Campagnolo |
| 1975 | Gitane - Campagnolo |
| 1974 | BIC |
| 1973 |  Rokado - de Gribaldy(from 25-05) |
| 1973 | HA-RO(until 24-04) |
| 1972 | Rokado |
| 1971 | Goudsmit - Hoff |
| 1970 | Peugeot - BP - Michelin |
| 1969 | Peugeot - BP - Michelin |
| 1968 | Peugeot - BP - Michelin |
| 1967 | Televizier - Batavus |
| 1967 | Netherlands B |
| 1966 | Televizier - Batavus |
| 1965 | Televizier |
Victories
| This year | 0 |
| Total | 34 |