Info
| Last name | Demuysere |
| First name | Jef |
| Nationality |  Belgium |
| Date of birth | 26-07-1907 |
| Place of birth | Wervik |
| Passed away | 30-04-1969 |
| Age when passed away | 61 |
| Place of passing | Antwerpen |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Giro d'Italia (2.HC) | |||||||
| 2 |  Standings | ||||||
| 28-05 | Stage 17Bolzano - Milano (284.0km) | ||||||
| 22-05 | 2 | Stage 13Bologna - Ferrara (62.0km) | |||||
| 15-05 | 3 | Stage 8Napoli - Foggia (195.0km) | |||||
| 07-05 | 2 | Stage 2Torino - Genova (216.0km) | |||||