| Modelo | Velocidad máxima |
|---|---|
| RSC8EX | 12.9 km/h - 8 millas/h |
| RSC6EX | 12.9 km/h - 8 millas/h |
| RR4EX | 7.7 km/h - 4.8 millas/h |
| Gregory RSC7EX | 11.3 km/h - 7 millas/h |
| Gregory RSC5EX | 12.9 km/h - 8 millas/h |
| Gregory RSC4EX | 13.5 km/h - 8.4 millas/h |
| Gregory RSC3EX | 14.5 km/h - 9 millas/h |
| Gregory RS6EX | 7.7 km/h - 4.8 millas/h |
| Gregory RS5EX | 7.7 km/h - 4.8 millas/h |
| Gregory RS4EX | 7.7 km/h - 4.8 millas/h |
| Gregory RS3EX | 7.7 km/h - 4.8 millas/h |
| Gregory RR6EX | 7.7 km/h - 4.8 millas/h |
| Gregory RR5EX | 7.7 km/h - 4.8 millas/h |
| Gregory RR3EX | 7.7 km/h - 4.8 millas/h |
| Gregory RC4EX | 7.7 km/h - 4.8 millas/h |
| Gregory RC3EX | 7.7 km/h - 4.8 millas/h |