| Modèle | Hauteur libre | Vitesse maximale |
|---|---|---|
| WF600T-1 | 495 mm - 1.6 pi | 29 km/h - 18 mile / h |
| WF550T-3 | 500 mm - 1.6 pi | 20 km/h - 12.4 mile / h |
| WF550-3 | 500 mm - 1.6 pi | 20 km/h - 12.4 mile / h |
| WF450T-3 | 475 mm - 1.6 pi | 27.1 km/h - 16.8 mile / h |
| WF450T-1 | 505 mm - 1.7 pi | 26.3 km/h - 16.3 mile / h |
| WF450-3 | 475 mm - 1.6 pi | 27.1 km/h - 16.8 mile / h |
| WF22T-2 | 525 mm - 1.7 pi | 19.3 km/h - 12 mile / h |
| WF22A-2 | 510 mm - 1.7 pi | 19.5 km/h - 12.1 mile / h |