Info
| Last name | Jonkman |
| First name | Geert-Jan |
| Nationality |  Netherlands |
| Date of birth | 24-01-1984 |
| Age | 41 |
| Date | Rank | Race |
|---|---|---|
| 23-04 | 75 | Arno Wallaard Memorial (1.2) |
| 11-01 | 6 | Wielerzesdaagse van Rotterdam (2) |
Teams
| Year | Team |
|---|---|
| 2012 | Koga Cycling Team |
| 2007 | Ubbink-Syntec Cycling Team |
Victories
| This year | 0 |
| Total | 0 |