





Extendable Lowbed Semi Trailer for Oversized Cargo
Telescopic low bed that extends to the length of the machine you are moving
If you need to transport oversized or overweight goods, our extendable lowbed semi trailer is the best choice. Designed specifically for heavy machinery, construction equipment, and oversized goods, this trailer can adjust its body according to the length of the goods, ensuring that it can handle the transportation of large equipment and other industrial machinery with ease.
- Size
- 12500*2500*1550mm
- Axle
- 3 Axle
- Max Payload
- >30000 kg
- Loading capacity
- 40-80T
Built at SINOHENG Trailer Factory, Jinan, Shandong, China. Exported to 30+ countries across Southeast Asia, Africa, the Middle East and South America.
Operators This Trailer Is Built Around
- Heavy haulage operators moving wind, crane and plant components that exceed a fixed deck
- Equipment dealers delivering machinery of widely different lengths from one trailer
Problems It Solves
Over-length loads overhang a fixed deck
The body adjusts to the length of the cargo, so long items are carried on the deck rather than hanging off the back.
Tall machinery breaks height limits
The low platform design reduces overall transport height so oversized loads clear bridges and underpasses.
What You Get For the Money
40 to 80 tons loading capacity
Three axles with over 30,000 kg payload on a Q355B main beam with reinforced bearings.
Mechanical or air suspension
Chosen against the route, from site tracks to sealed highway work.
WABCO brakes and 50#/90# kingpin
Standard brand components matched to the tractor you already run.
Technical Description
Technical Construction
This trailer is made of high-strength steel and features reinforced bearings, offering extremely high load-bearing capacity and stability, ensuring the safety of goods during long-distance transportation. Its low flat plate design can reduce the height of goods transportation, ensuring that oversized goods can pass through Bridges and tunnels smoothly and solving the problem of high-altitude obstacles during transportation.
Build and Finish
Whether you are transporting heavy machinery in the construction industry or need to transport extra-long equipment, our extendable low flatbed semi-trailers can provide a stable, efficient, and safe transportation experience. Contact us immediately for detailed quotations and customized solutions!
Operating Detail
SINOHENG Trailer Factory is an enterprise specializing in the production and sales of trailers, dedicated to providing customers with high-quality and high-performance trailer products. We use high-strength steel and optimized design to ensure that the products maintain high load-bearing capacity while being lightweight, meeting customers’ dual demands for transportation efficiency and cost control.
Manufacturing Notes
Our products are not only popular across the country but also exported in bulk to over 30 countries and regions in Southeast Asia, Africa, the Middle East, South America, etc., earning the trust of customers worldwide. Moreover, we offer comprehensive after-sales service to ensure you have no worries. Choosing SINOHENG means choosing quality, choosing professionalism, and choosing peace of mind.
Included Equipment
- Telescopic design – The vehicle length is adjustable, flexibly adapting to the transportation needs of extra-long goods
- Heavy-duty load-bearing capacity – Made of high-strength steel to ensure transportation stability
- Customized services – Customize the number of axles, vehicle length, width, etc., according to your transportation needs
- Hydraulic ramp design – Simplifying the loading and unloading of heavy equipment and enhancing efficiency
- Factory direct sales, price advantage – No middlemen, ensuring the most competitive prices
- Global distribution service – Fast delivery, supporting transportation worldwide
Extendable Lowbed Semi Trailer for Oversized Cargo Specification Sheet
Figures below are the published specification for the standard build. Anything not listed is confirmed on the approval drawing before production, and we mark unknowns as TBC rather than estimating them.
| Size | 12500*2500*1550mm |
|---|---|
| Axle | 3 Axle |
| Max Payload | >30000 kg |
| Loading capacity | 40-80T |
| Landing Gear | 28t Heavy Duty |
| Main Beam | Q355B |
| Suspension | Mechanical Suspension /Air Suspension |
| Brake System | WABCO |
| King pin | 50#/90# |
| Tire | 12R22.5 |
| Color | Customers Optional |
This Build in the Factory








How It Compares
A fixed low bed is cheaper, lighter and simpler, and is the better buy if your loads fit inside 13 m. The extendable version earns its cost only when over-length items are regular work.
Operating Notes
- Pin the extension positively at the working length before loading.
- Recalculate axle loads after every change of length.
- Inspect the sliding sections and locking pins for wear at every service.
Every vehicle ships with an illustrated operation manual covering coupling, braking and turning technique.
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View specification →Questions About This Trailer
How far does it extend?
Extension range is set per order because it depends on the loads you carry and your permit conditions. Send the longest item you move and we will quote the matching range.
Do I need permits?
Almost always, once you extend. Permit rules are national, so confirm with your road authority before ordering and we will build the trailer to suit the dimensions they allow.
Air or mechanical suspension for this trailer?
Mechanical for construction and mining access. Air where you run long highway distances or carry load-sensitive equipment.
Do you ship to my country?
SINOHENG exports in bulk to 30+ countries and regions across Southeast Asia, Africa, the Middle East and South America. Send your destination port with the enquiry and we will quote delivery with the trailer.
Ask for a Drawing Before You Commit
We confirm dimensions, axle loads and coupling height on an approval drawing before any steel is cut, so the trailer is legal and couples to your tractors.