| MODEL | NORTON INTERNATIONAL MODEL 30 1955 |
| Year | 1955 |
| Engine Type | 4-stroke single, SOHC |
| Displacement / Capacity | 490.1 cc / 29.9 cu in |
| Bore X Stroke | 79 x 100 mm |
| Compression Ratio | 7.23:1 |
| Cooling System | Air |
| Max Power | 22 kW / 29.5 hp @ 5500 rpm |
| Max Torque | — |
| Ignition | Lucas dynamo |
| Induction | Amal TT carburettors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed close ratio |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Cradle |
| Front Suspension | Roadholder telescopic fork |
| Rear Suspension | Undamped plungers |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | 1410 mm / 55.5 in |
| Ground Clearance | — |
| Dry Weight | 176 kg / 390 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 156 km/h / 97 mph |
The sporting roadster descended from the pre-war racing International, admired for handling and performance. It was costly and fussy to maintain, and production dwindled to special orders before ending in 1958.
