Wheel Sizes
| Series | Diameter | Wheel Configuration | Max Capacity |
|---|---|---|---|
| Series 25 | 3 – 6″ | Single | 350 lbs |
| Series 33 | 4 – 8″ | Single | 675 lbs |
| Series 38 | 6 – 8″ | Single | 1,000 lbs |
| Series 38-3 | 6 – 10″ | Single | 1,800 lbs |
| Series 39 | 8 – 16″ | Single | 3,000 lbs |
| Series 40 | 10 – 16″ | Single | 4,500 lbs |
| Series 40H | 10 – 15″ | Single | 5,000 lbs |
| Series 138 | 10″ | Dual | 5,000 lbs |
| Series 140 | 8 – 16″ | Dual | 5,000 lbs |
| Series 339 | 16″ | Dual | 6,500 lbs |
| Series 340 | 10 – 16″ | Dual | 8,000 lbs |
| Series 440 | 10 – 15″ | Dual | 12,500 lbs |
| Series 539 | 15″ | Dual | 16,000 lbs |
| Series 539H | 15″ | Dual | 25,000 lbs |