Truck Trailer Guide: Types, Specs, and How to Choose

Luen Auto 3-axle flatbed semi trailer

A truck trailer is a non-powered vehicle designed to be coupled to a tractor truck for carrying freight. In commercial road transport, the term “truck trailer” usually refers to a semi-trailer whose front end is supported by the tractor's fifth wheel, combined with a truck such as a tractor truck, dump truck, or light duty truck.

Shandong Luen Auto Co., Ltd. (Luen Auto) is a professional manufacturer and exporter of semi trailers and trucks. The company was established in 2020 as a subsidiary of Luen Group and operates from Xuji Industrial Park, Liangshan County, Jining City, Shandong Province. Luen Auto's semi-trailer range covers lowbed, flatbed, dump, skeleton, van, fuel tank, dust tank, and CNG tank trailers; its truck range covers tractor trucks, used tractor trucks, dump trucks, used dump trucks, HOWO trucks, Shacman trucks, light duty trucks, and Foton trucks. The factory area exceeds 50,000 square meters, with approximately 130+ employees and a production capacity of 1,500 units per year. Annual exports exceed USD 30,000,000, with 80% of sales coming from export markets in Africa, South America, and the Middle East.

The global semi-trailer market was estimated at USD 22.8 billion in 2024 and is expected 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. Market-size estimates vary across research firms due to differences in sub-category inclusion — Fact.MR estimated USD 24.2 billion for 2025 and Market Research Future estimated USD 31.2 billion for 2024 — but the direction of demand is consistently upward.

Why Choosing the Right Truck Trailer Matters

Buyers at the discovery stage are typically trying to answer one question: which truck-trailer combination fits their cargo, route, and operating budget? The main selection variables are:

• Cargo type and weight: general cargo, bulk material, liquid, gas, containers, or heavy equipment.
• Route and terrain: highway, off-road mining site, urban construction site, or cross-border corridor.
• Tractor compatibility: drive type (4×2, 6×4, 8×4), gross combination weight (GCW), and fifth-wheel coupling.
• Compliance: emission standards (Euro II–V) and market-specific rules such as ADR or DOT inspection requirements.

A common procurement mistake is selecting the trailer body before confirming whether the tractor unit has enough GCW rating for the loaded trailer. That is why manufacturers such as Luen Auto offer both the truck and the trailer side of the combination.

Truck and Trailer Market Background

China remains a major supply base for commercial vehicles in Africa, South America, and the Middle East. In 2024, Sinotruk (CNHTC) dominated China's heavy-duty truck exports, reaching a record 135,000 units, according to ChinaTrucks.org. Shacman heavy-truck exports reached 25,000 units in 2024, a 35% year-on-year increase, according to ChinaTruck.Net. Foton Motor recorded the top spot in total Chinese truck sales for 2024 with 523,000 units, including a record 100,000+ exports. On the used-vehicle side, the global used truck market was valued at USD 49.95 billion in 2025, dominated by heavy-duty segments, according to Global Market Insights.

Compliance rules also shape specifications. 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 (DOT) mandates annual safety inspections for trailers with a GVWR over 10,001 lbs under 49 CFR 396.17. Export buyers outside Europe and North America should confirm the local certification equivalent with their supplier.

Truck Trailer Types: The Luen Auto Lineup

The Luen Auto product range is organized into two groups: semi trailers for cargo carrying, and trucks for traction and self-loading work. The sections below describe each type with its available models and key specifications.

Flatbed Semi Trailer

The flatbed semi trailer is a general-purpose open-deck trailer for cargo that can be loaded from the top or the side.

• Models: 3-axle 40ft flatbed, 3-axle 45ft flatbed, 2-axle flatbed, drop-deck flatbed.
• Types: standard flatbed, step-deck, extendable flatbed, side-wall flatbed, container flatbed.
• Overall length: 12,500–16,000 mm (standard 13,000 mm); width: 2,480–2,500 mm; deck height: 1,250–1,550 mm.
• Payload: 40–60 tons; axles: 2 or 3, rated at 13 tons per axle.
• Frame: I-beam or H-beam; material: Q345B/Q550 high-tensile steel; floor: steel checker plate or hardwood.
• Tie-down rings every 500 mm; king pin: 2-inch or 3.5-inch; suspension: mechanical or air.
• Intended industries: construction material logistics, machinery transport, agriculture, project cargo, wind energy components.

Lowbed Semi Trailer (Lowboy)

The lowbed semi trailer is a low-deck heavy hauler designed for loads up to 100 tons.

• Models: 3-axle lowboy, 4-axle lowboy, detachable gooseneck lowboy, extendable low-bed.
• Types: fixed gooseneck, detachable gooseneck (RGN), hydraulic detachable gooseneck, pull-out extendable beam.
• Payload: 40–100 tons; axle load: 13–16 tons per axle.
• Loaded deck height: 450–600 mm; overall length: 11,000–18,000 mm; overall width: 2,480–3,000 mm.
• Maximum legal load height: up to 3.5 m; neck height: 1,200–1,400 mm.
• Materials: Q550/Q690 high-strength steel; HG785D quenched and tempered steel main beam.
• Gooseneck: fixed or hydraulic detachable; ramp: mechanical or hydraulic; king pin: 2-inch or 3.5-inch.
• Intended applications: heavy equipment transport, mining machinery relocation, wind turbine components, industrial machinery, oversized project cargo.

Luen Auto lowboy semi trailer for heavy equipment

Dump Semi Trailer

The dump semi trailer is a rear tipping trailer for bulk materials in mining and construction.

• Models: 3-axle and 4-axle dump semi trailers, U-type and rectangular box.
• Axle configurations: 2, 3, or 4; axle load: 13 tons per axle.
• Payload: 30–60 tons; box volume: 20–40 m³; box type: U-shape or rectangular.
• Overall length: 9,000–12,500 mm; overall width: 2,480–2,500 mm.
• Tipping angle: 45–50 degrees; hydraulic cylinder: HYVA front-mounted or telescopic.
• Frame: Q345B high-strength steel; floor: 8–12 mm, optional HARDOX wear-resistant steel.
• Suspension: mechanical leaf spring or air suspension; king pin: 2-inch or 3.5-inch.
• Intended industry: mining.

Skeleton Semi Trailer (Container Chassis)

The skeleton semi trailer is a container chassis built to carry ISO shipping containers.

• Models: 20ft chassis, 40ft chassis, 40ft+20ft combination chassis, 45ft trailer, 2-axle and 3-axle skeletons.
• Container compatibility: 20ft, 40ft, and 45ft ISO standard containers.
• Payload: 30–65 tons; axle configurations: 2, 3, or 4 axles at 13 tons each.
• 40ft standard dimensions: length 12,200–13,800 mm; width 2,480–2,500 mm; height 1,470–1,560 mm.
• Twist locks: 4, 6, or 8 units, ISO 1161 compliant; king pin: 2-inch or 3.5-inch.
• Frame: Q345B steel main beams; landing gear: JOST or SAF; suspension: mechanical leaf spring or air.
• Intended industries: port terminal operations, intermodal transport, cross-border container logistics, container freight stations.

Fuel Tank Semi Trailer

The fuel tank semi trailer is a liquid tanker for petroleum products, chemicals, edible oil, and water.

• Models: single-compartment fuel tanker, multi-compartment fuel tanker (1–6 bins), chemical liquid tanker, edible oil tanker, water tanker, 3-axle tank semi trailer.
• Tank thickness: 5–8 mm; materials: carbon steel (Q235B/Q345B), stainless steel 304/316, or aluminum alloy 5083.
• Overall dimensions: length 11,000–12,500 mm; width 2,480–2,500 mm.
• GVW: 40,000–42,000 kg; payload: 28,000–35,000 kg.
• Discharge control: bottom valve, pneumatic, or pump.
• Safety features: emergency valve, pressure vent, rollover protection, anti-static earthing reel, anti-static compartment separation.
• Intended industries: petroleum product distribution, oil and gas logistics.

Luen Auto fuel tank semi trailer

Powder (Dust) Tank Semi Trailer

The powder tank semi trailer is a pneumatic dry-bulk trailer for cement and powdered materials.

• Model: 3-axle 40m³ bulk cement trailer.
• Standard version: Q345B carbon steel; lightweight variant: 5083 aluminum alloy.
• Intended industry: cement manufacturing and distribution.

CNG Tube Trailer

The CNG tube trailer is a high-pressure trailer for compressed natural gas transport.

• Models: 8-tube, 10-tube, 12-tube, and 20-tube CNG trailers.
• Types: Type 1 steel cylinder and Type 2 composite wrapped cylinders.
• Working pressure: 20–25 MPa (200–250 bar); gas capacity: 2,000–6,000 Nm³; total water volume: 3,000–8,000 L.
• Tube diameter: 406–559 mm; cylinder material: 37Mn seamless steel or chrome-moly steel.
• Axles: 3; GVW: 40,000–42,000 kg; frame: Q345B steel.
• Overall dimensions: length 12,500–13,500 mm; width 2,480–2,500 mm.
• Safety features: pressure relief valve, emergency shutoff, earthing reel.
• Intended industries: off-grid natural gas distribution, industrial gas supply.

Trucks: Tractor Trucks, Dump Trucks, and Light Duty Trucks

The Sinotruk tractor truck (HOWO tractor head) is a heavy-duty truck designed for semi-trailer traction.

• Models: HOWO A7 6×4 371HP, HOWO TX 6×4 420HP/480HP, HOWO NX 6×4 400HP, HOWO 4×2 336HP, HOWO T7H 6×4 540HP.
• Drive types: 6×4, 4×2, 6×2; engine power: 336–540 HP; engine models include WD615.69, WP12.420, WP13.480, and MC13.54.
• Emission standards: Euro II, III, IV, V; GCW: 40,000–120,000 kg; curb weight: 8,500–10,500 kg.
• Overall dimensions (A7 standard): 6,800×2,496×3,170 mm.
• Intended applications: long-haul freight, container port drayage, flatbed/dump/tank/lowboy trailer traction, cross-border trucking in Africa, Southeast Asia, Central Asia, and the Middle East.

Sinotruk HOWO tractor truck

The Shacman tractor truck is a heavy-duty tractor truck for long-haul highway freight and mining logistics.

• Models: X3000, H3000, F3000, and L3000 series; drive types: 6×4 and 4×2.
• Engine power: 270–550 HP; engine options from Weichai, Cummins, and MAN.
• Emission standards: Euro II, III, IV, or V; GCW: 40,000–100,000 kg.
• Overall dimensions (H3000 standard): 6,785×2,490×3,560 mm.
• Transmission: Fast 9-speed or 12-speed; steering: ZF8098 power steering; front axle: 7.5T with drum or disc brake option; rear axle: MAN-tech double reduction 13T/16T.

The Sinotruk dump truck is a heavy-duty tipper for mining ore haulage and large-scale construction earthworks.

• Models: HOWO A7 6×4, HOWO TX 6×4, HOWO NX 6×4, HOWO 8×4, HOWO 4×2.
• Chassis: Q345B or Q550 high-strength steel; overall dimensions (6×4 standard): 8,400×2,496×3,400 mm.
• GVW: 25,000–49,000 kg; rated payload: 16–40 tons; cargo box volume: 14–30 m³.
• Engine power: 266, 336, 371, 380, 420, or 540 HP; emission standards: Euro II, III, or V.
• Transmission: HW10 10-speed or HW19 12-speed; hydraulic cylinder: HYVA or domestic single/double acting.
• Intended applications: road building, quarry, urban demolition, municipal infrastructure, mining and construction.

The Shacman dump truck is a mining-grade tipper for open-pit mining and large construction earthmoving.

• Models: X3000 6×4, X3000 8×4, H3000 6×4, F3000 6×4.
• Frame: Q510/Q550 high-strength steel; drive types: 6×4 or 8×4.
• Rated payload: 20–40 tons; cargo box volume: 14–25 m³; box type: U-shape or rectangular.
• Engine options: Weichai WP12.380, WP12.420, or Cummins ISM385/ISM440; power range: 340–550 HP.
• Overall dimensions (X3000 6×4 standard): 9,300×2,550×3,400 mm; top speed: 75 km/h.
• Rear axle: MAN-tech 13T/16T double reduction; tires: 12.00R20 (10 pcs); cab: M3000 reinforced cab.

The HOWO light duty truck is a 4×2 light truck for urban short-haul construction material delivery, municipal services, agriculture produce transport, light mining surface logistics, and rural road building.

• Models: HOWO light duty tipper 4×2 140HP, 160HP; HOWO light cargo 4×2 170HP; HOWO 4×2 180HP dropside truck.
• Engine power: 130–180 HP; engine options: Yuchai or Sinotruk light diesel (140HP/160HP/170HP); emission: Euro II/III/IV.
• GVW: 8,000–16,000 kg; rated payload: 5–10 tons; cargo box volume: 5–12 m³.
• Cargo box dimensions: 4,200×2,300×600 mm to 6,200×2,300×600 mm; overall dimensions: 7,000×2,496×2,700 mm.
• Transmission: 6-speed manual; tires: 7.50R16 or 8.25R16; fuel tank: 100–150 L; top speed: 90–100 km/h.

How to Select a Truck Trailer: Step-by-Step

1. Define the cargo profile. Record the cargo type, maximum unit weight, total payload per trip, and loading/unloading method.
2. Select the trailer body type. Use the comparison table below to match the body to the cargo: flatbed for general cargo, lowbed for heavy equipment, dump for bulk materials, skeleton for containers, tank for liquids, powder tank for dry bulk powder, CNG trailer for gas.
3. Confirm tractor compatibility. Verify that the tractor's GCW rating covers the loaded trailer. Luen Auto's Sinotruk HOWO tractor trucks are rated at 40,000–120,000 kg GCW; Shacman tractor trucks at 40,000–100,000 kg.
4. Choose the axle configuration and suspension. More axles increase legal payload distribution; air suspension is available on flatbed and container chassis; mechanical leaf spring is standard across the range.
5. Check the route and terrain. For off-road mining and construction, reinforced U-box dump bodies, high-strength frames (Q510/Q550/Q690), and 6×4 or 8×4 drive types are available.
6. Verify compliance for the destination market. Confirm emission standards (Euro II–V options), ADR certification for dangerous-goods tankers in Europe, and DOT inspection rules in the United States.
7. Request specification sheets and compare. Ask the supplier for model-specific drawings, payload tables, and material specifications before ordering.

Truck Trailer Use Cases by Industry

• Mining: Shacman X3000 and Sinotruk HOWO dump trucks for ore haulage; dump semi trailers for overburden; lowboy semi trailers for relocating excavators and mining machinery.
• Construction and municipal infrastructure: HOWO light duty trucks for urban site access; Sinotruk and Shacman dump trucks for earthworks; flatbed semi trailers for steel, pipe, and timber delivery.
• Port and intermodal logistics: Skeleton semi trailers (20ft/40ft/45ft) paired with Sinotruk or Shacman tractor trucks for container drayage and cross-border transport.
• Oil and gas logistics: Fuel tank semi trailers for petroleum product distribution; CNG tube trailers for off-grid natural gas supply; powder tank trailers for cement used in pipeline and road construction.
• Agriculture: Flatbed semi trailers and HOWO light duty trucks for produce transport and rural road building.

Truck Trailer Comparison Table

Factory and Export Capability

Luen Auto operates a manufacturing facility covering over 50,000 square meters with approximately 130+ employees and an annual production capacity of 1,500 units. The R&D team consists of 5 engineers. Export business accounts for 80% of total sales, with annual exports exceeding USD 30,000,000. Major markets include Africa, South America, and the Middle East.

Luen Auto factory in Xuji Industrial Park, Liangshan County, Shandong Province

As a supplier of both trucks and trailers, Luen Auto can provide matched combinations — for example, a HOWO tractor truck with a flatbed or skeleton semi trailer, or a Shacman X3000 dump truck for mining sites. Buyers can also source used tractor trucks and used dump trucks from the same export channel.

Frequently Asked Questions

Conclusion

Choosing a truck trailer starts with the cargo, then the trailer body, and then the tractor unit. The Luen Auto lineup covers the full combination: flatbed, lowbed, dump, skeleton, fuel tank, powder tank, and CNG tube semi trailers, plus Sinotruk and Shacman tractor trucks, dump trucks, and HOWO light duty trucks. With a 50,000+ m² factory, a 5-engineer R&D team, and export markets across Africa, South America, and the Middle East, Luen Auto provides matched truck-trailer solutions for mining, construction, container logistics, oil and gas, and agriculture.

Talk to Luen Auto about your truck trailer requirement

Download the product catalog or request a quote for your cargo profile.

Website: www.luen-trailertruck.com | Email: luengroup@lhaxle.com | Phone/WhatsApp: +86 17686798823

Brochure: Download LUEN Auto Product Catalog (PDF)