| Attribute | Zündapp DB 255 Elastic 250 1955 × | Simson 425 T 1960 × |
|---|---|---|
| General | ||
| Production from (year) | 1955 | 1960 |
| Make | Zündapp | Simson |
| Model | Zündapp DB 255 Elastic 250 | Simson 425 T |
| Category | Sport | Allround |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 246 | 247 |
| Power (kw) | 9.5 | 8.8 |
| Cooling system | - | Air |
| Transmission type,final drive | - | Shaft drive (cardan) |
| Bore (mm) | 67 | 68 |
| Stroke (mm) | 70 | 68 |
| Ignition | - | Magneto |
| Chassis | ||
| Front suspension | Telescopic | - |
| Rear suspension | Two schock | - |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | - | Steel |
| Front tyre | 3.25-19 | 3.25-19 |
| Rear tyre | 3.25-19 | 3.25-19 |
| Seat | Dual | Single |
| Wheels | - | Spoked |
| Dimensions | ||
| Dry weight (kg) | 147 | 140 |
| Power/weight ratio | 0.0646 | 0.0629 |
| Performance | ||
| Top speed (km/h) | 100 | 100 |