Water-Cooled Gasoline Freight Trike
HM-04 is a 250cc heavy-duty cargo tricycle built for everyday hauling work. It is equipped with a water-cooled engine, 50×100mm steel frame, full-floating rear axle, and heavy-duty suspension. The spacious cargo bed can handle building materials, farm produce, tools, and other goods, making it a practical choice for farms, construction sites, and rural roads.

product Parameter (specification)
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Model Name:HM-04 |
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Item Name |
ITEMS |
SPECIFICATION |
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Engine |
ENGINE TYPE |
Single cylinder, 4-stroke, water-cooling |
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DISPLACEMENT |
250 CC |
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BORE*STROKE |
74×63.92 | |
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COMPRESSION RATIO |
9.8:1 | |
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IGNITION METHOD |
CDI |
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STARTING MODE |
Electric/Kick |
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TRANSMISSION |
Cycle 5 gears |
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MAX.POWER(KW/RPM) |
12.5(1±5%)/6500 | |
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MAX.TORQUE(NM/RPM) |
21.5(1±5%)/5000 | |
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BODY |
FRAME KEEL |
50×100mm |
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CARGO |
2.2×1.4--2.4×1.4 | |
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REAR AXLE |
Full-Floating 9th Generation Booster King φ220 | |
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STEEL BOARD |
5+3 type (double layer ) | |
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SHOCK ABSORBER |
Zhanhu Shock Absorber | |
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TIRE |
5.00-12 (FR, RR) | |
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BATTERY |
12V 28Ah | |
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OTHERS |
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Loading |
loading/40HQ |
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Production details

The 250cc water-cooled engine is set up for heavy-duty use, with steady power when carrying heavy loads uphill. It can handle a 1.5-ton load on a 15% slope without frequent gear changes, and the cooling system helps maintain stable performance during extended uphill driving.
The bright LED dashboard clearly shows the tricycle's speed, mileage, and fuel level, making the main information easy to check while driving.
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FAQ
Q1: What engine does the HM-04 use?
A: The HM-04 uses a 250cc single-cylinder, four-stroke water-cooled engine. Its rated figures are 12.5kW at 6500rpm and 21.5N·m at 5000rpm. It is paired with a five-speed transmission and can be started by electric or kick start. The water-cooled setup is useful for long working hours and heavy-load transport, especially when the vehicle is used on slopes, rough roads, farms, or construction sites. For customers who need a gasoline cargo tricycle for regular commercial work, this engine setup offers a practical balance between pulling power and everyday operation.
Q2: How strong is the HM-04 frame?
A: The HM-04 uses a 50×100mm box-steel frame with four main beams and 4mm thick steel. The main load-bearing sections are made without weld joints, which gives the chassis a more solid structure in areas that take higher loads. Its section modulus is about 67% higher than that of a common 40×80mm frame. The full-floating rear axle also carries the vehicle load, rather than putting the full weight on the half-shafts. This setup is intended for customers who regularly move heavy materials and need a tricycle that can handle demanding working conditions.
Q3: What size is the cargo box on the HM-04?
A: The cargo box is available in sizes ranging from 2.2×1.4m to 2.4×1.4m, depending on the vehicle configuration. There is enough room for common loads such as building materials, agricultural products, tools, equipment, and other goods. The cargo bed uses a 5+3 double-layer steel board, which adds thickness to the loading surface. This is useful when the vehicle is used for frequent loading and unloading. The final cargo box size and configuration should be confirmed with the supplier before ordering, especially when the vehicle is being prepared for a specific market or working application.
Q4: Can the HM-04 handle heavy loads on slopes?
A: The HM-04 is designed with loaded uphill driving in mind. The 250cc water-cooled engine produces 21.5N·m of maximum torque at 5000rpm and works with a five-speed transmission. In factory testing, the vehicle was able to tow a 1.5-ton load on a 15% slope without frequent gear changes. The water-cooling system helps keep the engine temperature under control during extended uphill operation. Actual results will depend on the road surface, gradient, cargo weight, tire condition, and driving method, so the vehicle should always be operated within safe limits.
Q5: What does the HM-04 dashboard show?
A: The HM-04 comes with an LED instrument panel that shows the main information needed during daily driving. The display includes vehicle speed, mileage, and fuel level, allowing the driver to check these readings while operating the tricycle. The bright display is easy to read and keeps the layout simple. This is useful for commercial users who spend long hours on the vehicle and need to keep track of fuel and mileage. The dashboard does not require complicated settings, so the driver can focus on the road and the cargo during normal transport work.
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