Info
| Last name | Janssen |
| First name | Sjefke |
| Nationality |  Netherlands |
| Date of birth | 28-10-1919 |
| Place of birth | Elsloo |
| Passed away | 03-12-2014 |
| Age when passed away | 95 |
| Place of passing | Elsloo |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Tour de France (GT) | |||||||
| 09-07 | OTL | Stage 7Le Mans - Nantes (181.0km) | |||||
| 08-07 | 41 | Stage 6Caen - Le Mans (206.0km) | |||||
| 07-07 | 49 | Stage 5Dieppe - Caen (200.0km) | |||||
| 06-07 | 43 | Stage 4Lille - Dieppe (188.0km) | |||||
| 05-07 | 78 | Stage 3Liège - Lille (221.0km) | |||||
| 04-07 | 43 | Stage 2Metz - Liège (227.0km) | |||||
| 03-07 | 26 | Stage 1Strasbourg - Metz (195.0km) | |||||
| 10-05 | 8 | National Road Championships - Netherlands (CN) | |||||
| 26-04 | 8 |  Meisterschaft von Zürich (1.1) | |||||