All available race results Constant Niedergang
| Date | Race | Rank |
| 17/04 | Paris - Menin | 10 |
| 05/05 | Bruxelles - Roubaix | 8 |
| Tour de Belgique | ||
| 09/06 | Stage 3 | 14 |
| 25/09 | Paris - Tours | 10 |
Rider information for 1910
| Rank | 101 |
| Score | 168 |
| Name | Constant NIEDERGANG |
| Country | France |
| Team | Automoto |
| Date | Race | Rank |
| 16/04 | Paris - Roubaix | 8 |
| Tour de France | ||
| 02/07 | Stage 1 | 21 |
| 04/09 | Bol d'Or | 2 |
Rider information for 1911
| Rank | 110 |
| Score | 213 |
| Name | Constant NIEDERGANG |
| Country | France |
| Team | Automoto - Persan |
| Date | Race | Rank |
| 07/04 | Paris - Roubaix | 40 |
| 28/04 | Paris - Menin | 4 |
| Tour de France | ||
| 30/06 | Stage 1 | 22 |
| 02/07 | Stage 2 | 52 |
| 04/07 | Stage 3 | 70 |
| 06/07 | Stage 4 | 66 |
| 08/07 | Stage 5 | 22 |
| 01/09 | Bol d'Or | 4 |
Rider information for 1912
| Rank | 135 |
| Score | 143 |
| Name | Constant NIEDERGANG |
| Country | France |
| Team | Automoto - Persan |
| Date | Race | Rank |
| 09/03 | Etoile Carolorégienne | 14 |
| 23/03 | Paris - Roubaix | 23 |
| 06/04 | Paris - Tours | 10 |
| 20/04 | Paris - Menin | 7 |
| Tour de France | ||
| 29/06 | Stage 1 | 6 |
| 01/07 | Stage 2 | 77 |
Rider information for 1913
| Rank | 105 |
| Score | 220 |
| Name | Constant NIEDERGANG |
| Country | France |
| Team | Automoto - Continental |
No results available in season 1914.
Rider information for 1914
| Rank | 540 |
| Score | 0 |
| Name | Constant NIEDERGANG |
| Country | France |
| Team | Automoto - Continental |