Info
| Last name | Posthuma |
| First name | Joost |
| Nationality |  Netherlands |
| Date of birth | 08-03-1981 |
| Age | 44 |
| Place of birth | Hengelo |
Monuments
| Date | Rank | Race |
|---|---|---|
| 28-04 | 20 |  Ronde van Vlaanderen U23 (U23) |
| 12-01 | 3 | Dutch National Championships CX U23 (CU23) |
Teams
| Year | Team |
|---|---|
| 2012 |  RadioShack - Nissan |
| 2011 | Team Leopard - Trek |
| 2010 | Rabobank |
| 2009 | Rabobank |
| 2008 | Rabobank |
| 2007 | Rabobank |
| 2006 | Rabobank |
| 2005 | Rabobank |
| 2004 | Rabobank |
| 2003 | Rabobank TT3 |
| 2002 | Rabobank Espoirs |
Victories
| This year | 0 |
| Total | 15 |