Info
| Last name | De Lannoy |
| First name | Louis |
| Nationality |  Belgium |
| Date of birth | 16-06-1902 |
| Place of birth | Antwerpen |
| Passed away | 07-02-1968 |
| Age when passed away | 65 |
| Place of passing | Antwerpen |
Monuments
| Year | Milano - San Remo | Tour of Flanders | Paris - Roubaix | Liège-Bastogne-Liège | Il Lombardia |
|---|---|---|---|---|---|
| 1928 | - | 3 | - | - | - |
Grand tours
| Year | Giro d'Italia | Tour de France | Vuelta a España |
|---|---|---|---|
| 1929 | - | 6th | - |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Tour de France (2.HC) | |||||||
| 6 |  Standings | ||||||
| 2 |  Mountain | ||||||
| 28-07 | Stage 22Dieppe - Paris (332.0km) | ||||||
| 11-07 | 2 | Stage 10Luchon - Perpignan (323.0km) | |||||
| 03-07 | 1 | Stage 4Dinan - Brest (206.0km) | |||||