All available race results R. Polkinghorne
| Date | Race | Rank |
| 26/09 | Warrnambool - Melbourne | 54 |
Rider information for 1930
| Rank | 1223 |
| Score | 0 |
| Name | R. POLKINGHORNE |
| Country | Australia |
| Team | Individual |
| Date | Race | Rank |
| 26/09 | Warrnambool - Melbourne | 54 |
| Rank | 1223 |
| Score | 0 |
| Name | R. POLKINGHORNE |
| Country | Australia |
| Team | Individual |