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 | |||||
|---|---|---|---|---|---|---|---|
| 19-04 | 16 |  La Flèche Wallonne (1.1) | |||||
| 12-04 | 9 |  Paris-Roubaix (CDM) | |||||
| Ronde van België (2.3) | |||||||
| 7 |  Standings | ||||||
| 10-04 | 1 | Stage 4Knokke-Heist - Knokke-Heist (258.0km) | |||||
| 05-04 | 22 | Ronde van Vlaanderen (CDM) | |||||
| 21-03 | 2 |  Milano-Sanremo (CDM) | |||||
| Paris - Nice (2.1) | |||||||
| 15 | Standings | ||||||
| 16-03 | Stage 8bNice - La Turbie (9.0km) | ||||||
| 16-03 | 9 | Stage 8aSeillans - Nice (108.0km) | |||||
| 13-03 | 6 | Stage 5Bollène - Plan-de-Cuques (220.0km) | |||||
| 11-03 | 7 | Stage 3Autun - Saint-Étienne (208.0km) | |||||
| 09-03 | 8 | Stage 1Dourdan - Joigny (141.0km) | |||||
| 28-02 | 29 | Omloop Het Volk (1.1) | |||||
| 15-02 | 7 | Trofeo Laigueglia (1.4) | |||||
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 |