A straight truck with retractable trailing axles that stretch the bridge formula to legally carry tri-axle-plus tonnage while still maneuvering like a straight truck.
| Payload | 20–26 tons |
|---|---|
| Body volume | 16–20 cu yd |
| GVWR | 70,000–80,000 lb with trailing axles deployed |
| Used price (2026) | $70,000–$135,000 |
| New price (2026) | $215,000–$280,000 |
| Typical hourly rate | $150–$210/hr |
| Typical per load | $390–$650 |
| Fuel economy | 5.0–6.0 blended |
| Insurance | $6,500–$13,500/yr |
Super dumps are the answer when you want maximum payload without a trailer. The trailing-axle hardware adds cost and maintenance, so they only pay off with high annual tonnage.
| Type | Payload | Used price | Hourly rate |
|---|---|---|---|
| Single-Axle Dump Truck | 6–8 tons | $18,000–$45,000 | $85–$135/hr |
| Tandem-Axle Dump Truck | 12–15 tons | $35,000–$85,000 | $105–$165/hr |
| Tri-Axle Dump Truck | 16–22 tons | $50,000–$110,000 | $135–$195/hr |
| Quad-Axle Dump Truck | 20–26 tons | $65,000–$130,000 | $155–$220/hr |
| End Dump Trailer | 22–26 tons | $18,000–$45,000 (trailer only) | $140–$200/hr |
| Side Dump Trailer | 22–28 tons | $25,000–$55,000 (trailer only) | $145–$205/hr |
| Super Dump Truck | 20–26 tons | $70,000–$135,000 | $150–$210/hr |
| Transfer Dump Truck | 22–26 tons | $60,000–$120,000 (truck + transfer) | $140–$200/hr |
Retractable trailing axles extend the wheelbase, which under the federal bridge formula allows a legally higher gross weight than a conventional straight truck.
Only at high annual tonnage. If you haul fewer than roughly 25,000 tons a year, a standard tri-axle usually nets more.
Run the numbers before you sign anything — then get the full inspection checklist, financing playbook, and pricing math inside the course.