Info
| Last name | Jonkman |
| First name | Geert-Jan |
| Nationality |  Netherlands |
| Date of birth | 24-01-1984 |
| Age | 42 |
About Geert-Jan Jonkman
Geert-Jan Jonkman is a Dutch professional cyclist, 42 years old. Active in track cycling, road cycling.
| Date | Rank | Race |
|---|---|---|
| 21-04 | 88 | Int. Ronde van Noord-Holland (1.2) |
| 08-01 | 10 | Wielerzesdaagse van Rotterdam (2) |