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 | |||||
|---|---|---|---|---|---|---|---|
| 21-09 | 34 |  Paris-Brussel (1.1) | |||||
| Ronde van Nederland (2.3) | |||||||
| 17 |  Standings | ||||||
| 28-08 | 3 | Stage 3bAssen - Assen (22.0km) | |||||
 Tour de Suisse (2.1) | |||||||
| 64 | Standings | ||||||
| 24-06 | Stage 10Brugg - Zürich (166.0km) | ||||||
| 19-06 | 7 | Stage 5aDavos - Sargans (64.0km) | |||||
| 01-05 | 8 | Meisterschaft von Zürich (1.1) | |||||
| 17-04 | 54 | Liège-Bastogne-Liège (CDM) | |||||
| 14-04 | 58 | La Flèche Wallonne (1.1) | |||||
| 26-03 | 3 | E3 Prijs Harelbeke (1.1) | |||||
| 20-03 | 4 | Omloop van het Waasland (Nat) | |||||
Teams
Victories
| This year | 0 |
| Total | 0 |