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 |
|---|---|---|
| 23-04 | 75 | Arno Wallaard Memorial (1.2) |
| 11-01 | 6 | Wielerzesdaagse van Rotterdam (2) |