Debutants
Thomas Dekker is the youngest debutant in World Championships in 2005. There are 71 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | DEKKER Thomas | Netherlands | 21y + 19d |
| 2 | LÖFKVIST Thomas | Sweden | 21y + 174d |
| 3 | BRAJKOVIČ Janez | Slovenia | 21y + 281d |
| 4 | GRIVKO Andrey | Ukraine | 22y + 49d |
| 5 | RAISIN Saul | United States | 22y + 262d |
| 6 | MAZUR Peter | Poland | 22y + 297d |
| 7 | BORRAJO Anibal Andres | Argentina | 22y + 313d |
| 8 | SIUTSOU Kanstantsin | Belarus | 23y + 47d |
| 9 | MACHADO Honorio Rafael | Venezuela | 23y + 61d |
| 10 | PARISIEN François | Canada | 23y + 151d |
| 11 | SARAMOTINS Aleksejs | Latvia | 23y + 170d |
| 12 | FERNANDES Mac Donald Trindade | Brazil | 23y + 261d |
| 13 | KVASINA Matija | Croatia | 23y + 295d |
| 14 | SHKARPETA Denis | Uzbekistan | 23y + 320d |
| 15 | NICÁCIO Pedro | Brazil | 23y + 347d |
| 16 | SOHRABI Mehdi | Iran | 23y + 348d |
| 17 | POZZATO Filippo | Italy | 24y + 15d |
| 18 | NEVES Bruno Ricardo Fernandes | Portugal | 24y + 20d |
| 19 | PIRES Bruno | Portugal | 24y + 133d |
| 20 | LÓPEZ Juan Carlos | Colombia | 24y + 154d |
| 21 | IGLINSKIY Maxim | Kazakhstan | 24y + 160d |
| 22 | CUMMINGS Steve | Great Britain | 24y + 190d |
| 23 | POSTHUMA Joost | Netherlands | 24y + 201d |
| 24 | BAZAYEV Assan | Kazakhstan | 24y + 215d |
| 25 | KERN Christophe | France | 24y + 250d |
| 26 | SAEIDI TANHA Abbas | Iran | 24y + 264d |
| 27 | HESJEDAL Ryder | Canada | 24y + 290d |
| 28 | MCLEOD Ian | South Africa | 24y + 357d |
| 29 | BENNATI Daniele | Italy | 25y + 1d |
| 30 | ZARGARI Amir | Iran | 25y + 56d |
| 31 | GESLIN Anthony | France | 25y + 108d |
| 32 | WIGGINS Bradley | Great Britain | 25y + 150d |
| 33 | SHARMEN Robin | Great Britain | 25y + 291d |
| 34 | PERRY James Lewis | South Africa | 25y + 310d |
| 35 | LANCASTER Brett | Australia | 25y + 314d |
| 36 | BERNUCCI Lorenzo | Italy | 26y + 10d |
| 37 | DEVOLDER Stijn | Belgium | 26y + 27d |
| 38 | ZAJICEK Philip | United States | 26y + 189d |
| 39 | GOUROV Maxim | Kazakhstan | 26y + 238d |
| 40 | ZARĘBSKI Jarosław | Poland | 26y + 242d |
| 41 | MACMASTER Fraser | New Zealand | 26y + 315d |
| 42 | BONGIORNO Guillermo Ruben | Argentina | 27y + 58d |
| 43 | BALČIŪNAS Linas | Lithuania | 27y + 223d |
| 44 | NASCIMENTO Antonio Xavier | Brazil | 28y + 37d |
| 45 | PEREIRO Óscar | Spain | 28y + 53d |
| 46 | LEUKEMANS Björn | Belgium | 28y + 86d |
| 47 | NURITDINOV Rafael | Uzbekistan | 28y + 105d |
| 48 | FERNÁNDEZ Gerardo Luis | Argentina | 28y + 180d |
| 49 | NAZON Jean-Patrick | France | 28y + 250d |
| 50 | HENDERSON Gregory | New Zealand | 29y + 15d |
| 51 | CRETSKENS Wilfried | Belgium | 29y + 77d |
| 52 | MAHORIČ Mitja | Slovenia | 29y + 136d |
| 53 | BENČÍK Petr | Czech Republic | 29y + 239d |
| 54 | PRÁZDNOVSKÝ Martin | Slovakia | 29y + 338d |
| 55 | GERGANOV Evgeni | Bulgaria | 29y + 359d |
| 56 | SOEÍRO Pedro Miguel Miranda | Portugal | 30y + 14d |
| 57 | MIZBANI Ghader | Iran | 30y + 19d |
| 58 | MÉDICI Matías | Argentina | 30y + 88d |
| 59 | KAZEMI Sarai Ahad | Iran | 30y + 126d |
| 60 | RIŠKA Martin | Slovakia | 30y + 130d |
| 61 | ASKARI Hossein | Iran | 30y + 186d |
| 62 | BLANCO David | Spain | 30y + 206d |
| 63 | DA CRUZ Carlos | France | 30y + 279d |
| 64 | GREEN Rodney Jock | South Africa | 31y + 125d |
| 65 | VASILEV Krassimir | Bulgaria | 31y + 172d |
| 66 | ANDRLE René | Czech Republic | 31y + 177d |
| 67 | FUKUSHIMA Koji | Japan | 32y + 35d |
| 68 | VALACH Ján | Slovakia | 32y + 37d |
| 69 | MAY Márcio | Brazil | 33y + 126d |
| 70 | FUKUSHIMA Shinichi | Japan | 34y + 12d |
| 71 | IIJIMA Makoto | Japan | 34y + 225d |