Big truck towing capacity in our inventory ranges from 20 to 80 tons, depending on tractor model and configuration. The Dongfeng 13L tractor (520 hp, 2,500 N·m torque) can tow 50 tons on highways, while specialized heavy-haul tractors (optional reinforced frames) achieve 80 tons for oversized cargo. Towing capacity is influenced by: 1) engine power/torque, 2) transmission gear ratios (16-speed AMT), 3) axle configuration (6x4 drive for traction), 4) fifth-wheel rating (20–35 tons vertical load). All tractors include electronic stability control (ESC) and anti-lock braking (ABS) for safe towing, with heavy-haul models featuring auxiliary cooling systems and reinforced drivelines. Contact our heavy-haul team for detailed GCW (gross combination weight) charts, weight distribution guidelines, and permits for oversized transport.