Info
| Last name | Jonkman |
| First name | Geert-Jan |
| Nationality |  Netherlands |
| Date of birth | 24-01-1984 |
| Age | 41 |
| Date | Rank | Race |
|---|---|---|
| 21-04 | 88 | Int. Ronde van Noord-Holland (1.2) |
| 08-01 | 10 | Wielerzesdaagse van Rotterdam (2) |
Teams
| Year | Team |
|---|---|
| 2012 | Koga Cycling Team |
| 2007 | Ubbink-Syntec Cycling Team |
Victories
| This year | 0 |
| Total | 0 |