| S4—3-foot frame | S4—4-foot frame | S4—5-foot frame | |
| 高 (front, rear) | 2.3 inches, 5.6 inches (58 mm, 142 mm) | 2.3 inches, 5.6 inches (58 mm, 142 mm) | 2.3 inches, 5.6 inches (58 mm, 142 mm) |
| 宽 | 37.7 inches (957 mm) | 49.6 inches (1,259 mm) | 61.1 inches (1,551 mm) |
| 深 | 28.8 inches (731 mm) | 28.8 inches (731 mm) | 28.8 inches (731 mm) |
