| Modelo | Eje de ruedas |
|---|---|
| RSC8EX | 1956.8 mm - 6.4 pies. |
| RSC6EX | 1624.6 mm - 5.3 pies. |
| RR4EX | 1676.4 mm - 5.5 pies. |
| Gregory RSC7EX | 1777 mm - 5.8 pies. |
| Gregory RSC5EX | 1499.6 mm - 4.9 pies. |
| Gregory RSC4EX | 1396 mm - 4.6 pies. |
| Gregory RSC3EX | 1295.4 mm - 4.3 pies. |
| Gregory RS6EX | 1624.6 mm - 5.3 pies. |
| Gregory RS5EX | 1624.6 mm - 5.3 pies. |
| Gregory RS4EX | 1594.1 mm - 5.2 pies. |
| Gregory RS3EX | 1594.1 mm - 5.2 pies. |
| Gregory RR6EX | 1758.7 mm - 5.8 pies. |
| Gregory RR5EX | 1758.7 mm - 5.8 pies. |
| Gregory RR3EX | 1638.3 mm - 5.4 pies. |
| Gregory RC4EX | 1548.4 mm - 5.1 pies. |
| Gregory RC3EX | 1396 mm - 4.6 pies. |