Debutants
Russell Downing is the youngest debutant in Isle of Man International in 1999. There are 6 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | DOWNING Russell | Linda McCartney Racing Team | 20y + 306d |
| 2 | MILLAR David | Cofidis | 22y + 172d |
| 3 | OTTO Raphael | Team EC - Bayer Worringen | 22y + 192d |
| 4 | LEGTENBERG Joost | Giant - Löwik | 23y + 329d |
| 5 | STEPHENS Matthew | Linda McCartney Racing Team | 29y + 172d |
| 6 | WALKER Chris | Linda McCartney Racing Team | 34y + 91d |