Tractor trailer towing capacity, while not specified on the website, is tailored to the heavy-duty trucks in our portfolio. Dongfeng and Chenglong tractor models are equipped with 11-13L diesel engines (power output 380-520 hp), capable of towing gross combination weights (GCW) from 40 to 60 tons. The towing capacity is influenced by: 1) engine torque (up to 2,500 N·m), 2) transmission gear ratios (16-speed automated manual), and 3) axle configurations (6x4 drive for maximum traction). For long-haul applications, tractors with 520 hp engines can tow 50-ton trailers at 8% grade with a 0.85 power factor. Specialized heavy-haul tractors (optional) feature reinforced frames and upgraded cooling systems, increasing GCW to 80 tons for oversized cargo. All tractors are equipped with antilock braking systems (ABS) and electronic stability control (ESC) for safe towing. Contact our tractor specialists for detailed towing capacity charts, including weight distribution guidelines, hitch ratings, and compliance with regional axle load regulations.