Info
| Last name | Koster |
| First name | Bjorn |
| Nationality |  Netherlands |
| Date of birth | 11-02-2004 |
| Age | 21 |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Vuelta Junior a la Ribera del Duero (2.1) | |||||||
| 99 |  Standings | ||||||
| 21-08 | 113 | Stage 3Aranda de Duero - Aranda de Duero (115.0km) | |||||
| 20-08 | 85 | Stage 2Langa de Duero - San Esteban de Gormaz (94.0km) | |||||
| 19-08 | 121 | Stage 1Caleruega - Pedrosa de Duero (102.0km) | |||||
| 02-07 | 23 | National Road Championships - Netherlands U19 (CN) | |||||
| SPIE Intern. Juniorendriedaagse (2.1) | |||||||
| 26 | Standings | ||||||
| 22-05 | 29 | Stage 3Velzeke - Velzeke (99.0km) | |||||
| 21-05 | 60 | Stage 2bSluiskil - Sluiskil (80.0km) | |||||
| 21-05 | 81 | Stage 2aWestdorpe - Westdorpe (11.0km) | |||||
| 20-05 | 23 | Stage 1Axel - Axel (102.0km) | |||||
| XXVIII. Gipuzkoa Klasikoa (2.1) | |||||||
| 59 | Standings | ||||||
| 24-04 | 58 | Stage 2Egia - Egia (108.0km) | |||||
| 23-04 | 107 | Stage 1Deba - Deba (105.0km) | |||||
| 20-03 | 39 |  Guido Reybrouck Classic (1.1) | |||||
Teams
| Year | Team |
|---|---|
| 2025 | Giant Store Assen CT - NWVG |
| 2024 | Giant Store Assen - NWVG |
Victories
| This year | 0 |
| Total | 0 |