Info
| Last name | Jonkers |
| First name | Jan |
| Nationality |  Netherlands |
| Date of birth | 29-08-1955 |
| Age | 70 |
| Place of birth | Oud Gastel |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 18-09 | 40 |  Paris-Brussel (1.1) | |||||
| 08-09 | 11 |  GP de Fourmies (1.1) | |||||
| Ronde van Nederland (2.3) | |||||||
| 24-08 | 8 | Stage 5aBreda - Den Bosch (123.0km) | |||||
| 24-08 | 6 | Stage 5bOss - Den Bosch (36.0km) | |||||
| 23-06 | 20 | National Road Championships - Netherlands (CN) | |||||
| 25-05 | 8 | Bordeaux-Paris (1.1) | |||||
| 14-04 | 26 | Paris-Roubaix (CDM) | |||||
| 10-04 | 84 | Gent-Wevelgem (1.1) | |||||
| 07-04 | 20 | Ronde van Vlaanderen (CDM) | |||||
Teams
Victories
| This year | 0 |
| Total | 0 |