Truck Trailer Types & Specs: A Buyer's Guide

Luen Auto (Shandong Luen Auto Co., Ltd.) is a professional manufacturer and exporter of semi trailers and trucks, established in 2020 as a subsidiary of Luen Group and headquartered at Xuji Industrial Park, Liangshan County, Jining City, Shandong Province, China. This guide explains what a truck trailer is, which semi trailer types exist, how each type is specified, and what to check before you source one.

What Is a Truck Trailer?

In commercial road transport, a truck trailer commonly refers to a semi trailer pulled by a tractor truck, also called a tractor head or prime mover. The combination is used for freight that a single rigid truck cannot carry efficiently. A semi trailer is coupled to the tractor through a fifth wheel and king pin, with king pin sizes of 2 inches or 3.5 inches. Because the tractor and trailer can be matched separately, fleet owners can select the trailer type for the cargo and the tractor model for the weight.

The main risk for first-time buyers is choosing the wrong trailer family. A flatbed trailer is not built to carry an excavator at a low deck height, and a lowboy trailer is inefficient for container work. The first step is to match the cargo type to the trailer type.

Industry Background

The global semi trailer market was estimated at USD 22.8 billion in 2024 and is projected to reach USD 42.3 billion by 2033, according to Grand View Research. Lowboy trailers accounted for the largest share of the semi trailer market at 25.7% in 2024, per the same source. The global used truck market was valued at USD 49.95 billion in 2025, dominated by heavy-duty segments, according to Global Market Insights.

Chinese truck and trailer exports remain a major supply source. Sinotruk (CNHTC) led China's heavy-duty truck exports in 2024 with 135,000 units, a record, according to ChinaTrucks.org. Shacman heavy-truck exports reached 25,000 units in 2024, up 35% year-on-year, according to ChinaTruck.Net. Foton Motor recorded the top total Chinese truck sales in 2024 with 523,000 units, including more than 100,000 exports, according to ChinaTrucks.org.

Luen Auto focuses on this export segment: export sales account for 80% of total sales, with annual exports exceeding USD 30,000,000 and major markets in Africa, South America, and the Middle East. The manufacturing facility covers over 50,000 square meters and employs approximately 130+ staff, with annual production capacity of 1,500 units.

Truck Trailer Solutions from Luen Auto

Luen Auto manufactures semi trailers in eight families: lowbed, flatbed, dump, skeleton, van, fuel tank, dust tank, and CNG tank. It also supplies trucks, including tractor trucks, used tractor trucks, dump trucks, used dump trucks, HOWO trucks, Shacman trucks, light duty trucks, and Foton trucks.

Flatbed Semi Trailer

The flatbed semi trailer is an open-deck trailer for general freight. It is available as a 3-axle 40ft flatbed, 3-axle 45ft flatbed, 2-axle flatbed, or drop-deck flatbed. Overall length ranges from 12,500 to 16,000 mm (standard 13,000 mm), width from 2,480 to 2,500 mm, and deck height from 1,250 to 1,550 mm. Payload capacity is 40–60 tons, with 2 or 3 axles rated at 13 tons per axle. The frame is I-beam or H-beam, the suspension is mechanical or air, and tie-down rings are spaced every 500 mm. Floor options are steel checker plate or hardwood. Intended uses include construction material logistics, machinery transport, agriculture, project cargo, and wind energy components.

Lowboy Semi Trailer

The lowboy semi trailer is designed for heavy and oversized loads. Payload capacity is 40–100 tons, and loaded deck height is 450–600 mm, which keeps heavy machinery within legal height limits. Overall length is 11,000–18,000 mm and width 2,480–3,000 mm. Axle load is 13–16 tons per axle. The main beam is box-section high-strength steel, made of Q550/Q690 steel or HG785D quenched and tempered steel. Configurations include fixed gooseneck, detachable gooseneck (RGN), hydraulic detachable gooseneck, and pull-out extendable beam. Intended uses include heavy equipment transport, mining machinery relocation, wind turbine components, industrial machinery, and oversized project cargo.

Dump Semi Trailer

The dump semi trailer is a rear-dump unit for mining and earthworks. It is built from Q345B high-strength carbon steel, with axle configurations of 2, 3, or 4 axles. Payload capacity is 30–60 tons, box volume 20–40 m³, and box type is U-shape or rectangular. The hydraulic cylinder is HYVA front-mounted or telescopic, and the tipping angle is 45–50 degrees. Floor thickness is 8–12 mm, with optional HARDOX wear-resistant steel. Overall length is 9,000–12,500 mm and width 2,480–2,500 mm. Intended use is the mining industry, including coal, ore, and construction earthmoving operations.

Tank Semi Trailer

The tank semi trailer is a liquid transport trailer for petroleum, fuel, chemical, edible oil, and water. Tank capacity is 20,000–50,000 L with 1–6 compartments. Tank thickness is 5–8 mm. Materials are carbon steel (Q235B/Q345B), stainless steel 304/316 for food or chemical grade, or aluminum alloy 5083 for lightweight. Overall length is 11,000–12,500 mm, width 2,480–2,500 mm, GVW 40,000–42,000 kg, and payload 28,000–35,000 kg. Discharge is by bottom valve, pneumatic, or pump. Safety features include emergency valve, pressure vent, rollover protection, anti-static earthing reel, and anti-static compartment separation.

Powder Tank Semi Trailer

The powder tank semi trailer is a pneumatic dry bulk trailer for cement, fly ash, lime, and mineral powders. Models include 3-axle 40 m³, 50 m³, and 60 m³ tankers. The standard version is Q345B carbon steel; the lightweight variant is 5083 aluminum alloy. Working pressure is 0.196–0.2 MPa and test pressure 0.26 MPa. Discharge speed is 1.6 tons per minute, with vertical discharge up to 15 m and horizontal discharge up to 5 m. Particle size limit is 0.1 mm diameter. GVW is 40,000–42,000 kg with 3 axles. Typical applications include cement manufacturing and distribution, power plant fly ash disposal, and construction material supply.

CNG Tube Trailer

The CNG tube trailer transports compressed natural gas. Models include 8-tube, 10-tube, 12-tube, and 20-tube trailers, in Type 1 steel cylinder or Type 2 composite wrapped versions. Working pressure is 20–25 MPa (200–250 bar), gas capacity 2,000–6,000 Nm³, and total water volume 3,000–8,000 L. Cylinder material is 37Mn seamless steel or chrome-moly steel; the frame is Q345B steel. Tube diameter is 406–559 mm. Safety features include pressure relief valve, emergency shutoff, and earthing reel. It is intended for off-grid natural gas distribution and industrial gas supply.

Container Semi Trailer (Skeleton)

The container semi trailer, also called a skeleton trailer or container chassis, carries ISO containers. It is compatible with 20ft, 40ft, and 45ft containers. Payload capacity is 30–65 tons, and axle configurations are 2, 3, or 4 axles at 13 tons each. Twist locks are ISO 1161 compliant, available in 4, 6, or 8 units. Landing gear is JOST or SAF, and the main beams are Q345B steel. Overall length for a 40ft standard chassis is 12,200–13,800 mm, width 2,480–2,500 mm, and height 1,470–1,560 mm. Intended uses include port terminal operations, intermodal transport, cross-border container logistics, and container freight stations.

Tractor Trucks and Dump Trucks

Luen Auto also supplies the truck side of the combination. Sinotruk tractor trucks, also known as HOWO tractor heads, include HOWO A7 6×4 371HP, HOWO TX 6×4 420HP/480HP, HOWO NX 6×4 400HP, HOWO 4×2 336HP, and HOWO T7H 6×4 540HP. Drive configurations are 6×4, 4×2, and 6×2. GCW is 40,000–120,000 kg, with engine power from 336 to 540 HP and Euro II to V emissions. Shacman tractor trucks include X3000, H3000, F3000, and L3000 series, with 6×4 and 4×2 drive, 270–550 HP, and GCW of 40,000–100,000 kg.

Sinotruk dump trucks are available as HOWO A7 6×4, HOWO TX 6×4, HOWO NX 6×4, HOWO 8×4, and HOWO 4×2. GVW is 25,000–49,000 kg, rated payload 16–40 tons, box volume 14–30 m³, and engine power 266–540 HP. Shacman dump trucks include X3000 6×4, X3000 8×4, H3000 6×4, and F3000 6×4, with payload 20–40 tons, box volume 14–25 m³, and a Q510/Q550 high-strength steel frame. For urban short-haul work, the HOWO light duty truck is a 4×2 vehicle with 130–180 HP, GVW 8,000–16,000 kg, rated payload 5–10 tons, and box volume 5–12 m³, intended for construction material delivery, municipal services, and rural road building.

Step-by-Step: How to Choose the Right Truck Trailer

1. Define the cargo. Record the type of goods, maximum weight per load, and dimensions. Bulk earth requires a dump trailer; liquid fuel requires a tank trailer; an excavator requires a lowboy.
2. Select the trailer family. Use the comparison table below to match cargo to trailer type.
3. Check tractor-trailer compatibility. Confirm king pin size (2 or 3.5 inches) and that the tractor's GCW covers the loaded trailer. For example, a Sinotruk tractor truck has a GCW of 40,000–120,000 kg, which matches semi trailers with payloads up to 60 tons.
4. Verify compliance. In Europe, transport of dangerous goods in fuel/tank trailers requires ADR certification under the ADR Agreement. In the United States, the Department of Transportation requires annual safety inspections for trailers with GVWR over 10,001 lbs (49 CFR 396.17). For container transport, check that twist locks are ISO 1161 compliant.
5. Request specifications and a quotation. Ask for the exact model parameters, material options, and export documentation.

Use Cases by Industry

• Urban construction and local infrastructure (e.g., Nigeria, Ghana): 6×4 dump trucks such as the Sinotruk HOWO A7 6×4 371HP are used for short-haul earthmoving on restricted urban sites; the HOWO light duty truck handles smaller material delivery with a 5–10 ton payload.
• Mining and quarrying: Dump semi trailers with 30–60 ton payloads and U-shape boxes, paired with Shacman or Sinotruk dump trucks, move ore and overburden.
• Heavy equipment logistics: Lowboy semi trailers with 40–100 ton payloads move excavators, bulldozers, and cranes.
• Port and container operations: Skeleton semi trailers with ISO 1161 twist locks handle 20ft, 40ft, and 45ft containers.
• Fuel and chemical distribution: Tank semi trailers with multi-compartment design and anti-static equipment deliver petroleum products.
• Cement and powder logistics: Powder tank semi trailers with pneumatic discharge deliver cement and fly ash to construction sites.
• Natural gas distribution: CNG tube trailers with Type 1 steel or Type 2 composite cylinders supply off-grid industrial gas.

Truck Trailer Type Comparison

Frequently Asked Questions

1. What compliance or certification requirements apply to truck trailers?

In Europe, transport of dangerous goods in fuel/tank trailers requires ADR certification under the ADR Agreement. In the United States, the Department of Transportation mandates annual safety inspections for trailers with a GVWR over 10,001 lbs (49 CFR 396.17). For container transport, Luen Auto's skeleton semi trailers use ISO 1161 compliant twist locks, available in 4, 6, or 8 units.

2. Which truck trailer types does Luen Auto manufacture?

Luen Auto manufactures semi trailers in eight families: lowbed, flatbed, dump, skeleton, van, fuel tank, dust tank, and CNG tank. It also supplies trucks, including tractor trucks, used tractor trucks, dump trucks, used dump trucks, HOWO trucks, Shacman trucks, light duty trucks, and Foton trucks. Example specifications include a flatbed semi trailer with a 40–60 ton payload, a lowboy semi trailer with a 40–100 ton payload, and a dump semi trailer with a 30–60 ton payload.

3. How much does a truck trailer cost?

Price depends on trailer type, axle count, material, and optional features. Luen Auto does not publish list prices. For example, a powder tank semi trailer is available in standard Q345B carbon steel or lightweight 5083 aluminum alloy, and either choice affects price. Request a quotation from Luen Auto for current pricing.

4. Can I get a product catalog or sample information from Luen Auto?

Yes. Luen Auto's product catalog is available for download, and the sales team can provide specifications and quotation details. Contact email is luengroup@lhaxle.com, phone/WhatsApp +86 17686798823, or visit https://www.luen-trailertruck.com.

5. What is Luen Auto's production and export capacity?

Luen Auto operates a factory area of over 50,000 square meters with approximately 130+ employees, annual production capacity of 1,500 units, and annual exports exceeding USD 30,000,000. Export sales account for 80% of total sales, with major markets in Africa, South America, and the Middle East. Lead time depends on model and order volume; contact Luen Auto for the current production schedule and a quotation.

Conclusion

Truck trailer selection is a matter of matching cargo type, weight, and route to the correct trailer family. Luen Auto covers the full combination: flatbed, lowboy, dump, tank, powder, CNG, and skeleton semi trailers, plus HOWO and Shacman tractor trucks and dump trucks. Because export sales represent 80% of output, the company's factory, documentation, and specification options are aligned with overseas buyers. For procurement decisions, verify local compliance rules such as ADR in Europe or DOT inspection in the United States, and request a detailed specification sheet before ordering.