| MODEL | GASGAS 280 PRO 2005 |
| Year | 2005 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 272.2 cc / 16.61 cu in |
| Bore X Stroke | 76.0 x 60.0 mm / 3.0 x 2.4 in |
| Compression Ratio | — |
| Cooling System | Liquid |
| Max Power | — |
| Max Torque | — |
| Ignition | Ducati programmable digital CDI |
| Induction | Carburettor, Dell'Orto PHBL 26BS |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed |
| Clutch | Hydraulic, 2 steel, 3 fibre discs |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Deltabox, CrMo tubing |
| Front Suspension | Marzocchi 40 mm conventional telescopic forks |
| Rear Suspension | Progressive linkage system |
| Front Brakes | Single disc, 4-piston |
| Rear Brakes | Single disc, 2-piston |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 635 mm / 25.0 in |
| Wheelbase | 1320 mm / 52.0 in |
| Ground Clearance | — |
| Dry Weight | 65.8 kg / 145.0 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 2.75-21 |
| Rear Tyre | 4.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 2.9 Litres / 0.77 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A big-capacity version of the 2005 Pro trials bike, with a 272 cc two-stroke and a stronger 40 mm Marzocchi fork. It used a programmable digital CDI and was aimed at riders wanting strong low-rev torque for hard sections.
