# 1955 Ulster Grand Prix

The 1955 Ulster Grand Prix was the seventh round of the 1955 Grand Prix motorcycle racing season. It took place on 11–13 August 1955 at the Dundrod Circuit.

## 500 cc classification

| Pos | Rider | Manufacturer | Laps | Time | Points |
| 1 | Bill Lomas | Moto Guzzi | 25 | 2:00:31 | 8 |
| 2 | John Hartle | Norton | 25 | +0:06 | 6 |
| 3 | Dickie Dale | Moto Guzzi | 25 | +3:13 | 4 |
| 4 | Bob McIntyre | Norton | | | 3 |
| 5 | Peter Murphy | Matchless | | | 2 |
| 6 | John Clark | Matchless | | | 1 |
| 7 | Eric Jones | Norton | | | |
| 8 | Percy Tait | Norton | | | |
| 9 | Bill Collett | Matchless | | | |
| 10 | Morrie Low | BSA | | | |
| 11 | Bob Matthews | Velocette | | | |
| 12 | Malcolm Templeton | Matchless | | | |
| 13 | Ken Tostevin | Matchless | | | |
| 14 | A. F. J. D. Martin | Norton | | | |
| 15 | F. H. Turner | Norton | | | |
| 16 | Ralph Rensen | Norton | | | |
| 17 | Ernie Oliver | Norton | | | |
| 18 | R. Knox | Norton | | | |
| 19 | R. H. King | Norton | | | |
| 20 | K. W. Swallow | Matchless | | | |
| 21 | J. Hayes | AJS | | | |
| 22 | W. R. Evans | Matchless | | | |

## 350 cc classification

| Pos | Rider | Manufacturer | Laps | Time | Points |
| 1 | Bill Lomas | Moto Guzzi | 20 | 1:39:38 | 8 |
| 2 | John Hartle | Norton | 20 | +0:14 | 6 |
| 3 | John Surtees | Norton | 20 | +1:13 | 4 |
| 4 | Cecil Sandford | Moto Guzzi | | | 3 |
| 5 | Bob McIntyre | Norton | | | 2 |
| 6 | Peter Murphy | AJS | | | 1 |
| 7 | Jack Brett | AJS | | | |
| 8 | Derek Powell | Norton | | | |
| 9 | John Clark | AJS | | | |
| 10 | Frank Perris | AJS | | | |
| 11 | Bill Aislabie | AJS | | | |
| 12 | Percy Tait | AJS | | | |
| 13 | Sammy Miller | Norton | | | |
| 14 | Arthur Wheeler | AJS | | | |
| 15 | Ralph Rensen | Norton | | | |
| 16 | Barry Stormont | BSA | | | |
| 17 | Bob Matthews | Velocette | | | |
| 18 | Bill Collett | AJS | | | |
| 19 | R. Ferguson | AJS | | | |
| 20 | Fred Cook | AJS | | | |
| 21 | Robin Fitton | Velocette | | | |
| 22 | A. F. J. D. Martin | AJS | | | |
| 23 | Malcolm Templeton | AJS | | | |
| 24 | W. Ferguson | AJS | | | |
| 25 | Austin Carson | BSA | | | |
| 26 | J. W. Parkinson | Norton | | | |
| 27 | S. Murray | Norton | | | |
| 28 | H. Plews | AJS | | | |
| 29 | Tom Turner | Norton | | | |
| 30 | R. Wijesinghe | Norton | | | |
| 31 | K. W. Swallow | AJS | | | |
| 32 | G. J. Canning | BSA | | | |
| 33 | P. McGarrity | BSA | | | |
| 34 | R. Dean | Norton | | | |
| 35 | N. Crossett | AJS | | | |
| 36 | W. R. Evans | AJS | | | |
| 37 | L. Rice | AJS | | | |
| 38 | N. Ellwood | Velocette | | | |
| 39 | S. McAvoy | AJS | | | |
| 40 | H. O'Reilly | Norton | | | |
| 41 | Morrie Low | BSA | | | |

## 250 cc classification

| Pos | Rider | Manufacturer | Laps | Time | Points |
| 1 | John Surtees | NSU | 13 | 1:06:00.4 | 8 |
| 2 | Sammy Miller | NSU | 13 | +24.0 | 6 |
| 3 | Umberto Masetti | MV Agusta | 13 | +1:16.6 | 4 |
| 4 | Bill Lomas | MV Agusta | | | 3 |
| 5 | Cecil Sandford | Moto Guzzi | | | 2 |
| 6 | Hermann Paul Müller | NSU | | | 1 |
| 7 | Arthur Wheeler | Moto Guzzi | | | |
| 8 | Percy Tait | Velocette | | | |
| 9 | Jimmy Herron | Norton | | | |
| 10 | Harold Kirby | Velocette | | | |
| 11 | Hans Haldemann | Moto Guzzi | | | |
| 12 | S. Hodgkins | Excelsior | | | |
| 13 | David Andrews | Excelsior | | | |