Truck Trailer Buying Guide: Types, Specs & Selection Tips

Figure 1: A flatbed semi trailer — the most widely used truck trailer type for open-deck cargo.

Shandong Luen Auto Co., Ltd. is a professional manufacturer and exporter of semi trailers and heavy-duty trucks based in Liangshan County, Jining City, Shandong Province, China. The company, which sells under the Luen Auto brand, produces flatbed, lowbed, dump, skeleton, van, fuel tank, powder tank, and CNG tube semi trailers, alongside Sinotruk and Shacman tractor trucks, dump trucks, and light-duty trucks.

A truck trailer is a non-powered vehicle designed to be coupled to a tractor truck (also called a tractor head or prime mover) so the combination carries freight by road. In international transport, most cargo trailers are semi-trailers: they connect to a fifth-wheel coupling mounted on the tractor truck and are supported at the rear by their own axles.

This guide explains the main truck trailer types, the specifications that matter, how to match a trailer to a tractor truck, and how Luen Auto fits into the global supply of trailers and commercial trucks.

Why the truck trailer choice matters

Choosing the wrong trailer type creates problems that last as long as the vehicle itself. A flatbed cannot safely carry an excavator; a lowbed is inefficient for grain; a dump trailer without a reinforced floor fails in abrasive mining conditions; a tanker without the correct compartment layout cannot legally carry several fuel grades in one run.

Procurement teams evaluating a truck trailer typically weigh four factors: cargo type and loading method, payload and volume, terrain and route conditions, and compatibility with the tractor truck, including fifth-wheel size, king pin type (2-inch or 3.5-inch), and gross combination weight (GCW) rating.

Industry background

Semi-trailers are one of the largest categories in commercial vehicle equipment. 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 that market at 25.7% in 2024, reflecting demand for heavy equipment movement.

Chinese truck manufacturers are a major export source for emerging markets. Sinotruk (CNHTC) reached a record 135,000 heavy-duty truck exports in 2024, according to ChinaTrucks.org, while Shacman exported 25,000 units in 2024, a 35% year-on-year increase, and Foton Motor recorded total Chinese truck sales of 523,000 units in 2024, including more than 100,000 exports. For buyers in Africa, South America, and the Middle East, these brands are also part of Luen Auto's truck lineup. The global used truck market, relevant for operators who buy used tractor trucks or used dump trucks, was valued at USD 49.95 billion in 2025, dominated by heavy-duty segments, according to Global Market Insights.

Luen Auto truck trailer product line

Luen Auto's range is organised into two groups: semi trailers and trucks. Established in 2020 as a subsidiary of Luen Group, the company operates a factory of more than 50,000 square meters, employs over 130 staff, and has an annual production capacity of 1,500 units. Export business accounts for 80% of total sales, with annual exports exceeding USD 30,000,000, mainly to Africa, South America, and the Middle East.

Semi trailers

Flatbed semi trailer

The flatbed semi trailer is an open-deck trailer for goods loaded from the side or top. Models include 3-axle 40ft, 3-axle 45ft, 2-axle, and drop-deck flatbeds. Overall length ranges from 12,500 to 16,000 mm (standard 13,000 mm), width 2,480–2,500 mm, deck height 1,250–1,550 mm, and payload capacity 40–60 tons with 2 or 3 axles rated at 13 tons each. The frame is I-beam or H-beam in Q345B/Q550 high-tensile steel, and the floor is steel checker plate or hardwood. It is intended for construction material logistics, machinery transport, agriculture, project cargo, and wind energy components.

Lowboy semi trailer

The lowboy semi trailer is designed for heavy payloads up to 100 tons. Its loaded deck height of 450–600 mm suits oversized equipment. Configurations include fixed gooseneck, detachable gooseneck (RGN), hydraulic detachable gooseneck, and pull-out extendable beam. Payload capacity is 40–100 tons; axle load is 13–16 tons per axle; overall length is 11,000–18,000 mm; width up to 3,000 mm. Main beams are box-section Q550/Q690 high-strength steel or HG785D quenched and tempered steel. Typical uses include heavy equipment transport, mining machinery relocation, wind turbine components, and oversized project cargo.

Dump semi trailer

The dump semi trailer is a rear-dump trailer built for mining and construction materials. Models include 3-axle and 4-axle versions plus U-type and rectangular box bodies. Payload capacity is 30–60 tons with box volume of 20–40 m³. The body is Q345B high-strength carbon steel with floor thickness of 8–12 mm; HARDOX wear-resistant steel is optional. Tipping angle is 45–50 degrees, driven by a HYVA front-mounted or telescopic hydraulic cylinder. Axle load is 13 tons per axle with mechanical leaf spring or air suspension.

Container (skeleton) semi trailer

The container semi trailer, also called a skeleton trailer or container chassis, is compatible with 20ft, 40ft, and 45ft ISO standard containers. Payload is 30–65 tons; axle configurations are 2, 3, or 4 axles at 13 tons each. Twist locks are ISO 1161 compliant in 4, 6, or 8 units; landing gear is manufactured by JOST or SAF; suspension is mechanical leaf spring or air. It is intended for port terminal operations, intermodal transport, cross-border container logistics, and container freight stations.

Fuel tank semi trailer

The tank semi trailer is classified as a petroleum/fuel tank trailer and chemical liquid tanker. Tank capacity ranges from 20,000 to 50,000 L with 1–6 compartments for multi-grade loads. Materials are carbon steel (Q235B/Q345B), stainless steel 304/316, or aluminum alloy 5083, with wall thickness of 5–8 mm. Payload is 28,000–35,000 kg at a gross vehicle weight (GVW) of 40,000–42,000 kg. Safety features include emergency valve, pressure vent, rollover protection, anti-static earthing reel, and anti-static compartment separation. It is intended for petroleum product distribution and oil and gas logistics.

Powder tank semi trailer

The powder tank semi trailer, such as the 3-axle 40 m³ bulk cement trailer, is a pneumatic dry-bulk tanker for cement, fly ash, lime, flour, and mineral powders. The standard version is made of Q345B carbon steel, while a lightweight variant uses 5083 aluminum alloy. Tank volume options are 32, 40, 45, 50, and 60 m³. Discharge uses compressed-air fluidization at a working pressure of 0.196–0.2 MPa, with discharge speed up to 1.6 tons per minute.

CNG tube trailer

The CNG tube trailer is a high-pressure gas transport trailer in 8-tube, 10-tube, 12-tube, and 20-tube configurations. Working pressure is 20–25 MPa (200–250 bar); gas capacity is 2,000–6,000 Nm³. Cylinders are 37Mn seamless steel or chrome-moly steel with total water volume of 3,000–8,000 L. The frame is Q345B steel with 3 axles and GVW of 40,000–42,000 kg. Safety features include pressure relief valve, emergency shutoff, and earthing reel. It is intended for off-grid natural gas distribution and industrial gas supply.

Trucks

Sinotruk and Shacman tractor trucks

Sinotruk tractor trucks, also known as HOWO tractor heads, are heavy-duty trucks in 6×4, 4×2, and 6×2 drive configurations. Models 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. Engine power ranges from 336 to 540 HP and gross combination weight (GCW) reaches 120,000 kg. They are designed for long-haul freight, container port drayage, and cross-border trucking in Africa, Southeast Asia, Central Asia, and the Middle East.

Shacman tractor trucks cover the X3000, H3000, F3000, and L3000 series in 6×4 and 4×2 drive types, with engine power from 270 to 550 HP (Weichai, Cummins, or MAN) and GCW from 40,000 to 100,000 kg. Both brands operate with fifth-wheel couplings for semi trailer combinations.

Dump trucks

Sinotruk dump trucks include the HOWO A7 6×4 371HP, HOWO TX 6×4 420HP, HOWO NX 6×4 400HP, HOWO 8×4, and HOWO 4×2 models. GVW ranges from 25,000 to 49,000 kg, rated payload from 16 to 40 tons, cargo box volume from 14 to 30 m³, and engine power from 266 HP to 540 HP with Euro II, III, or V options. Shacman dump trucks (X3000 6×4/8×4, H3000, F3000) carry 20–40 tons in a 14–25 m³ U-shape or rectangular box, with frames of Q510/Q550 high-strength steel. These trucks are intended for mining ore haulage, large construction earthworks, road building, quarrying, urban demolition, and municipal infrastructure.

HOWO light duty truck

The HOWO light duty truck is a 4×2 vehicle with 130–180 HP engines, rated payload of 5–10 tons, and GVW of 8,000–16,000 kg. Configurations include light tipper, light cargo, dropside, mini dump truck, refrigerated light truck, and van light truck. It is intended for urban short-haul construction material delivery, municipal services, small contractor operations, agriculture produce transport, light mining surface logistics, and rural road building.

Luen Auto also lists used tractor trucks and used dump trucks among its main products, which is relevant for operators managing capital budgets in the used truck segment.

How to select a truck trailer: step by step

Step 1 — Define the cargo and loading method. Bulk materials favour dump or powder tank trailers; palletised goods favour vans or flatbeds; containers require skeleton chassis; oversized machines require lowboys; liquids require tankers.

Step 2 — Define payload and volume. Match rated payload to the densest expected load. For example, a dump semi trailer carries 30–60 tons in a 20–40 m³ box, a lowboy is rated 40–100 tons, and a flatbed carries 40–60 tons.

Step 3 — Consider operating terrain. Construction sites favour 6×4 dump trucks with reinforced U-type boxes; long paved routes favour highway tractor trucks; mining conditions may justify HARDOX wear-resistant floors and double-reduction axles.

Step 4 — Match the tractor and trailer. Verify fifth-wheel type, trailer king pin (2-inch or 3.5-inch), and total GCW against the tractor rating. Sinotruk tractor trucks offer GCW up to 120,000 kg; Shacman tractor trucks up to 100,000 kg.

Step 5 — Verify compliance. Luen Auto trucks are offered with Euro II, III, IV, or V emission options. In Europe, transport of dangerous goods in fuel/tank trailers requires ADR certification under the ADR Agreement; in the US, trailers over 10,001 lbs GVWR require annual DOT inspections. Confirm the certification required in the destination country.

Step 6 — Check supplier capability. Confirm factory capacity, export experience, and parts support before purchase. For urban construction projects in West African markets such as Nigeria and Ghana, Sinotruk parts and service availability supports local maintenance of Luen Auto supplied vehicles.

Use cases

Urban construction and municipal infrastructure. The HOWO light duty tipper 4×2 (140–180 HP) suits short-haul material delivery with 5–10 ton payloads, while Sinotruk 6×4 371HP dump trucks provide 16–25 m³ loads per trip on construction sites with restricted access and mixed paved/unpaved surfaces.

Mining and quarrying. Shacman X3000 and HOWO dump trucks with 20–40 ton payloads, combined with U-type dump semi trailers, suit ore haulage, open-pit mining, and large earthmoving cycles.

Long-haul freight. Sinotruk or Shacman tractor trucks with flatbed, skeleton, or van trailers cover cross-border haulage, container port drayage, and intermodal logistics.

Heavy equipment relocation. Lowboy semi trailers with 40–100 ton capacity transport excavators, bulldozers, cranes, and mining machinery.

Fuel and gas distribution. Multi-compartment tank semi trailers support petroleum product distribution, while CNG tube trailers enable off-grid natural gas supply and industrial gas distribution.

Comparison table: Luen Auto truck trailer types

Frequently asked questions

What emission standards are available on Luen Auto trucks?

Luen Auto trucks are offered with diesel engines covering Euro II, III, IV, and V emission standards depending on the model and export destination. HOWO light duty trucks (130–180 HP) are available in Euro II, III, and IV; Sinotruk and Shacman heavy-duty trucks are available in Euro II, III, IV, or V. Buyers should specify the emission requirement of their market when requesting a quotation.

Do Luen Auto tank and CNG trailers meet dangerous-goods safety requirements?

Safety requirements differ by region. In Europe, transport of dangerous goods in fuel/tank trailers requires ADR certification under the ADR Agreement; in the US, trailers over 10,001 lbs GVWR need annual DOT inspections. Luen Auto tank semi trailers are equipped with emergency valves, pressure vents, rollover protection, anti-static earthing reels, and anti-static compartment separation. CNG tube trailers operate at 20–25 MPa and include pressure relief valves, emergency shutoff, and earthing reels. Buyers should confirm the certification documents required for the destination market with the Luen Auto sales team before ordering.

Can Luen Auto supply a complete tractor truck and semi trailer combination?

Yes. Luen Auto's main product list includes semi trailers (lowbed, flatbed, dump, skeleton, van, fuel tank, dust tank, and CNG tank) and trucks (tractor truck, dump truck, light duty truck, and used versions). Sinotruk HOWO and Shacman tractor trucks provide GCW ratings up to 120,000 kg (Sinotruk) and 100,000 kg (Shacman), which cover the trailer payload ranges described in this guide. Buyers may therefore source a matched truck and trailer combination from a single exporter, with one contact point from inquiry to shipping.

How much does a truck trailer cost and what determines the price?

Luen Auto does not publish list prices, so a budget should be built from the configuration. The main price drivers are trailer type, axle count (2, 3, or 4), body material (Q345B carbon steel versus 5083 aluminum alloy), and options such as HYVA hydraulic cylinders or HARDOX wear-resistant floors. A two-axle flatbed and a four-axle lowboy with hydraulic detachable gooseneck are different investment levels. Request a quotation with your specification to obtain a budget figure.

Can I request a sample or inspect the truck trailer before ordering?

As a factory-based exporter, Luen Auto produces about 1,500 units per year at a facility covering more than 50,000 square meters in Xuji Industrial Park, Liangshan County, Jining City, Shandong Province, China. Buyers who wish to discuss inspection or sample arrangements can contact the sales team directly. A downloadable product catalog in PDF format covers the full truck and trailer lineup. Contact email is luengroup@lhaxle.com and phone/WhatsApp is +86 17686798823.

What is the lead time for a truck trailer order?

Luen Auto's annual production capacity is 1,500 units, and the R&D team consists of 5 engineers supporting configuration work. Published materials do not state a fixed lead time, because delivery depends on model, configuration, and the current production schedule. To plan procurement, download the LUEN Auto Product Catalog, send your specification to luengroup@lhaxle.com or WhatsApp +86 17686798823, and request current lead times together with a quotation.

Conclusion

Selecting the right truck trailer starts with defining the cargo, payload, terrain, and tractor compatibility, then sourcing from a manufacturer that can support the specification across the full combination. The semi trailer market continues to grow, and Chinese truck and trailer exports now supply a large share of fleet demand in Africa, South America, and the Middle East.

Luen Auto (Shandong Luen Auto Co., Ltd.) is a manufacturer and exporter of semi trailers and trucks with 80% of sales from exports exceeding USD 30,000,000 annually. Its product line covers flatbed, lowbed, dump, skeleton, van, fuel tank, powder tank, and CNG tube trailers, plus Sinotruk, Shacman, HOWO, and Foton trucks including used tractor trucks and used dump trucks.

Figure 2: Container skeleton semi trailer from Luen Auto's export product line.

Request a quotation or download the catalog

Get the full specification sheets, current lead times, and export documentation for any Luen Auto truck or trailer.

Download LUEN Auto Product Catalog (PDF)WhatsApp: +86 17686798823

Email: luengroup@lhaxle.com | Website: www.luen-trailertruck.com
Shandong Luen Auto Co., Ltd., Xuji Industrial Park, Liangshan County, Jining City, Shandong Province, China