General Specifications of 6×4 Towing Vehicles (Tractors)

1. Overall Dimensions

Length (Overall): 6.5–7.8 m (varies by cab type; short cab for urban distribution, long cab for long-haul)

Width (Overall): 2.49–2.55 m (complies with road width limits for most regions)

Height (Overall, Cab Roof):

Flat-roof cab: 2.8–3.0 m (suitable for low-clearance areas like tunnels)

High-roof cab: 3.3–3.8 m (with sleeping berth for long-haul drivers)

Wheelbase: 3,200–4,800 mm (common options: 3,800 mm for medium-load, 4,500 mm for heavy-load long-haul)

Front Overhang: 1.2–1.5 m; Rear Overhang: 0.8–1.1 m

2. Power System

Engine Type: Heavy-duty diesel engine (mainstream); optional LNG/CNG engine (for eco-friendly needs)

Engine Displacement: 10–13 L (matches 6×4 heavy-load demand; e.g., 12.5 L for 400+ hp models)

Maximum Power: 330–460 hp (243–338 kW); high-performance versions up to 500 hp for ultra-heavy transport

Maximum Torque: 1,500–2,300 N·m (delivered at 1,200–1,800 rpm; ensures strong low-speed traction for uphill/starting)

Fuel Supply System: Common Rail Direct Injection (CRDI) (meets Euro VI / EPA Tier 4 emission standards)

Emission Standard: Euro V / Euro VI (Europe), EPA Tier 4 Final (North America), China VI (China)

3. Load Capacity

Gross Vehicle Weight (GVW): 25,000–40,000 kg (standard for 6×4 tractors; 31,000 kg most common for long-haul)

5th Wheel Load (Towing Hitch Load): 16,000–25,000 kg (key parameter for matching semi-trailers; depends on axle load distribution)

Front Axle Load Rating: 7,000–9,000 kg (single front axle; uses 9.00–11.00 R20 tires for load support)

Rear Drive Axle Load Rating: 18,000–31,000 kg (tandem rear axles; each axle rated 9,000–15,500 kg)

4. Chassis & Drivetrain

Drive Axle Type:

Single-reduction drive axles (for high-speed long-haul; speed ratio: 3.08–3.73)

Wheel-end reduction drive axles (for heavy off-road/construction; speed ratio: 4.11–4.875)

Transmission:

Manual transmission: 10–16 gears (with synchronizer for smooth shifting)

Automatic transmission: 8–12-speed AMT (Automated Manual Transmission; optional for labor-saving long-haul)

Suspension System:

Front suspension: Parabolic leaf springs (3–4 leaves; lightweight and shock-absorbing)

Rear suspension: Multi-leaf springs (8–12 leaves for heavy load) or optional air suspension (for stable cargo protection and driver comfort)

Tires:

Front tires: 11R22.5 / 295/75 R22.5 (14PR load rating)

Rear tires: 11R22.5 / 295/75 R22.5 (16PR load rating); optional super single tires (445/50 R22.5) for fuel efficiency

5. Braking System

Service Brake:

Drum brakes (standard; cost-effective for heavy load) or disc brakes (optional; better heat dissipation for long downhill)

Hydraulic or air brake system (air brake standard for GVW > 12,000 kg)

Auxiliary Brake:

Engine brake (Jake Brake; reduces wear on service brakes during downhill)

Optional hydraulic retarder (for ultra-heavy transport; provides continuous braking force)

Safety Systems:

ABS (Anti-lock Braking System) + EBS (Electronic Braking System) (mandatory for regional compliance)

ESC (Electronic Stability Control) (optional; prevents rollover on slippery roads)

6. Cab & Comfort Features

Cab Type:

Day cab (no sleeping berth; for short-haul < 200 km)

Sleeper cab (single/double berth; berth size: 1.8×0.6 m for single, 1.8×1.2 m for double; for long-haul > 500 km)

Interior Features:

Driver seat: Air-suspended, adjustable (6-way) with lumbar support

Climate control: Manual or automatic air conditioning; heater for cold regions

Dashboard: Digital + analog display (shows speed, fuel, engine temperature, and fault codes)

Convenience: Power windows, central locking, Bluetooth radio, USB charging ports

Optional upgrades: GPS navigation, rear-view camera, refrigerator, and leather seats

7. Compliance & Certifications

Regional Certifications:

Europe: CE marking, ECE R110 (emissions), ECE R13 (braking)

North America: DOT certification, FMVSS 101 (controls), FMVSS 111 (mirrors)

China: CCC certification, GB 7258 (vehicle safety), GB 18352.6 (emissions)

Safety Standards: ISO 26262 (functional safety for electronic systems), ISO 14229 (diagnostic systems)

8. Fuel Economy & Optional Equipment

Fuel Consumption: 30–45 L/100 km (depends on load, speed, and road condition; 35 L/100 km average for 400 hp model at 80 km/h)

Optional Equipment:

Heavy-duty 5th wheel (for mining semi-trailers)

Tire pressure monitoring system (TPMS)

LED headlights (for better night visibility)

Extra fuel tank (600–1,000 L capacity for long-haul without refueling stops)

Product Introduction

This Heavy-Duty 6×4 Towing Vehicle (Tractor) for Long-Haul & Construction Logistics is a high-performance power unit engineered for heavy-load transport scenarios, including cross-regional long-haul cargo delivery, construction material hauling, and mining equipment towing. As a 6×4 drive model (6 wheels total, 4 drive wheels), it delivers exceptional traction and load-bearing stability-critical for navigating steep slopes, muddy construction sites, or fully loaded long-haul routes. Equipped with a powerful diesel engine (400–460 hp), advanced braking systems, and a driver-centric cab, it balances efficiency, safety, and comfort while complying with global emission standards (Euro VI, China VI, EPA Tier 4). This makes it an ideal choice for logistics companies, construction firms, and mining operators seeking reliable, heavy-duty towing solutions.

 Product Content Introduction

Heavy-Duty 6×4 Towing Vehicle (Tractor) for Long-Haul & Construction Logistics features a robust power system that ensures strong performance under heavy loads. It is powered by a 12.5L heavy-duty diesel engine with a maximum power output of 430 hp (316 kW) and peak torque of 2,100 N·m (delivered at 1,200–1,800 rpm)-providing ample low-speed traction for starting with fully loaded semi-trailers (e.g., 40-ton cargo) or climbing 15° slopes. The engine adopts Common Rail Direct Injection (CRDI) technology and meets Euro VI emission standards, reducing fuel consumption to 35–40 L/100 km (at 80 km/h) and minimizing environmental impact.

Heavy-Duty 6×4 Towing Vehicle (Tractor) for Long-Haul & Construction Logistics boasts excellent load capacity and a durable chassis design for long-term heavy use. It has a gross vehicle weight (GVW) of 31,000 kg and a 5th wheel load rating of 20,000 kg-compatible with most heavy-duty semi-trailers (e.g., refrigerated semi-trailers, back dump trailers). The rear drive axles are single-reduction types with a speed ratio of 3.73 (optimized for long-haul fuel efficiency), while the chassis uses high-tensile steel rails (300×150×8 mm) for enhanced rigidity. The suspension system combines parabolic front leaf springs (3 leaves) and rear multi-leaf springs (10 leaves), ensuring stable load distribution even on uneven roads.

Heavy-Duty 6×4 Towing Vehicle (Tractor) for Long-Haul & Construction Logistics prioritizes safety with a comprehensive braking and stability system. It is equipped with air disc brakes (front and rear) for fast heat dissipation-reducing brake fade during long downhill runs-and an engine brake (Jake Brake) that provides additional retardation force to protect service brakes. The standard ABS (Anti-lock Braking System) and EBS (Electronic Braking System) prevent wheel lock-up and ensure balanced braking, while the optional ESC (Electronic Stability Control) minimizes rollover risk on slippery or curved roads. These features fully comply with ECE R13 (Europe) and FMVSS 121 (North America) safety standards.

Heavy-Duty 6×4 Towing Vehicle (Tractor) for Long-Haul & Construction Logistics offers a comfortable, functional cab designed for long-haul driver convenience. It adopts a high-roof sleeper cab with a double berth (1.8×1.2 m) -providing ample rest space for two drivers-and an air-suspended driver seat (6-way adjustable with lumbar support) to reduce fatigue during 8+ hour shifts. The interior includes automatic climate control (heating + cooling), a digital-analog dashboard (displaying fuel level, engine temperature, and fault codes), Bluetooth radio, and two USB charging ports. Optional upgrades include a GPS navigation system, rear-view camera, and a 50L refrigerator-enhancing overall operational comfort.

Heavy-Duty 6×4 Towing Vehicle (Tractor) for Long-Haul & Construction Logistics meets global compliance requirements and supports flexible customization to fit regional needs. It holds CE (Europe), DOT (North America), and CCC (China) certifications, ensuring legal operation across major markets. Customization options include: an extra fuel tank (800L capacity for extended range without refueling), tire pressure monitoring system (TPMS), LED headlights (for better night visibility), and a heavy-duty 5th wheel (rated 25,000 kg) for mining-specific semi-trailers. It can also be configured with an LNG engine (instead of diesel) for eco-friendly fleets seeking lower carbon emissions.

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