Views: 0 Author: LUEN groups Publish Time: 2026-07-31 Origin: Site
Landing gear legs are the support legs installed at the front of a semi-trailer to hold it up when the tractor is disconnected. They are a key part of high-quality semi-trailer parts, ensuring safe coupling/uncoupling, stable parking, and reliable operation in daily logistics.
A good set of landing gear legs can:
Support heavy front loads safely
Make height adjustment easy and smooth
Reduce wear on the trailer and tractor
Improve overall safety and efficiency
Single-speed landing gear
Simple structure, one gear ratio
Faster lifting but higher crank force
Suitable for lighter trailers or frequent short stops
Two-speed landing gear
High gear for fast lifting under light load
Low gear for heavy-load adjustment with less effort
Most common for heavy-duty semi-trailers
Separate operation legs
Each leg operated independently
More flexible on uneven ground
Common in many standard trailers
Linkage legs
Connected by a cross shaft, operated together
Easier and faster to raise/lower both sides
Widely used on modern highway trailers
Steel legs – high strength, good for heavy loads
Aluminum alloy legs – lighter weight, corrosion-resistant
Surface treatment – painted, powder-coated, or galvanized for rust protection
High-quality legs often use:
High-strength steel with anti-corrosion coating
Reinforced mounting plates and brackets
Durable gears and bearings inside the gearbox
Typical ratings for heavy-duty semi-trailers:
Dynamic load: 28 tons per pair (common standard)
Static load: up to 80 tons per pair
Some heavy models: 30–40 tons dynamic, higher static
Always match the landing gear capacity to your trailer’s front axle load and gross weight.
Common dimensions:
Lift: 430–480 mm (standard range)
Height range: around 400–850 mm (depending on model)
Mounting plate: e.g., 230×345 mm or similar
These ensure:
Enough height to connect with different tractors
Stable support on varied ground conditions
Example for a 28-ton two-speed landing gear:
High gear: ~5.4 mm per turn of handle (fast lift)
Low gear: ~0.7–1.05 mm per turn (precise, low effort)
Crank force at 28T: around 35 kg (one-side operation)
Good gear design makes it easier to:
Raise/lower the trailer smoothly
Reduce operator fatigue and risk of injury
Flat pivot foot – standard, good for firm ground
Rocker foot – better contact on uneven surfaces
Air foot / cushioned foot – reduces ground damage, improves stability
T-shoe or square/round pad – different contact areas for different uses
When the tractor connects or disconnects:
Landing gear supports the front of the trailer
Proper height adjustment ensures smooth kingpin engagement
Prevents sudden drops or damage to the tractor and trailer
When the trailer is parked:
Landing gear carries the front load safely
Prevents the trailer from tipping or shifting
Supports safe loading/unloading operations
Good landing gear:
Reduces stress on the chassis and frame
Protects the kingpin and fifth wheel from misalignment
Extends the life of other high-quality semi-trailer parts (suspension, brakes, axles)
Landing gear legs are used on:
Flatbed semi-trailers – for construction equipment and general cargo
Van / dry freight trailers – for logistics and distribution
Container semi-trailers – for port and inland container transport
Low bed trailers – for heavy machinery transport
Tanker trailers – for fuel, chemical, and powder transport
They are essential for:
Daily logistics and long-haul transport
Construction, mining, and industrial projects
Ports, terminals, and distribution centers
Designed for 28 tons dynamic and up to 80 tons static per pair
Suitable for heavy-duty semi-trailers and harsh conditions
Two-speed gearbox for fast lift and low-effort adjustment
Linkage design for synchronized movement of both legs
High-strength steel or aluminum alloy construction
Anti-corrosion coating for long service life
Reliable gears, bearings, and seals
Strong mounting plates and brackets
Stable foot design for different ground conditions
Meets international standards (e.g., TTMA, AAR, ISO)
Standard dimensions for easy replacement
Widely available spare parts and repair kits
Simple maintenance: grease, inspect, and adjust
Check your trailer’s front load and gross weight.
Choose 28-ton, 30-ton, or higher capacity as needed.
For heavy-duty or mining trailers, select reinforced models.
Separate operation for more flexibility on uneven ground.
Linkage type for faster, synchronized operation.
Single-speed or two-speed depending on your needs.
Mounting plate size and bolt pattern.
Lift height and overall height range.
Compatibility with your existing cross shaft and crank handle.
High-strength steel or aluminum alloy construction.
Reputable brands (e.g., JOST, Holland, FUWA, or equivalent).
ISO 9001 or other quality certifications.
LUEN supplies high-quality landing gear legs as part of its high-quality semi-trailer parts range. Our landing gear:
Supports 28 tons dynamic and up to 80 tons static per pair.
Offers single-speed and two-speed options with smooth gearboxes.
Uses high-strength steel with anti-corrosion coating.
Includes flat, rocker, or T-shoe feet for different ground conditions.
Is compatible with standard semi-trailer frames and cross shafts.
Comes with warranty and after-sales support for key components.
Whether you need replacement legs for your fleet or new landing gear for custom trailers, LUEN can provide reliable, durable solutions.
If you want safe, stable, and long-lasting support for your semi-trailers, choose LUEN.
Come and buy LUEN landing gear legs today.
Contact LUEN now to get a quote, discuss your load capacity and configuration, and choose the landing gear legs that fit your trailers best.
