General Specifications for Sidebar Three-Axle Semi-Trailer Tire Axle

1. Basic Structure & Design

Axle Configuration: 3 parallel axles (tandem-triple setup) integrated with sidebar frame

Sidebar Material: High-strength low-alloy steel (Q345B or equivalent), thickness 8–12 mm; provides structural support and distributes load evenly across the trailer

Axle Arrangement: Equal axle spacing (1.3–1.5 meters between adjacent axles) to ensure balanced load distribution and stable driving

Mounting Type: Bolt-on or welded connection to the semi-trailer's main frame; compatible with standard sidebar-type semi-trailer chassis

2. Load Capacity

Single Axle Rated Load: 10–13 metric tons (22,046–28,660 lbs)

Total Three-Axle Load: 30–39 metric tons (66,138–85,980 lbs)

Load Classification: Meets ISO 13041 (Commercial vehicle wheels and rims – Load ratings) and GB/T 13873 (Chinese standard for semi-trailer axles)

Max Static Load: 120% of rated load (for short-duration loading during loading/unloading)

3. Axle Core Parameters

Axle Shaft Diameter: 80–100 mm (3.15–3.94 inches); forged 45# steel or 20CrMnTi (for high-torque scenarios)

Axle Length: 1.8–2.2 meters (5.91–7.22 feet); adjustable based on semi-trailer width (standard trailer width: 2.4–2.55 meters)

Spindle Specification: Tapered spindle (1:12 taper) with precision grinding; compatible with wheel hubs of size 16.5–22.5 inches

Bearing Type: Double-row tapered roller bearings (e.g., 32220, 32222); sealed and lubricated with lithium-based grease for dust/water resistance

4. Tire Compatibility

Tire Quantity per Axle: 2 tires (dual-wheel setup per axle), total 6 tires for three axles

Recommended Tire Size: 295/80R22.5, 11R22.5, 12R22.5 (radial tires for long-haul); 14.00R20 (for heavy-duty off-road use)

Wheel Rim Size: 22.5×9.00 inches (standard) or 20×8.25 inches (heavy-duty); steel or aluminum alloy rims

Wheel Track: 1.8–2.0 meters (5.91–6.56 feet); matches semi-trailer width to ensure stable cornering

5. Braking System

Brake Type: Drum brakes (standard) or disc brakes (optional for high-efficiency braking)

Brake Drum/Disc Size:

Drum brakes: Diameter 420 mm, width 180 mm (cast iron material, heat-resistant)

Disc brakes: Diameter 410 mm, thickness 32 mm (high-carbon steel with anti-rust coating)

Brake Actuation: Pneumatic brake chambers (30/30 or 30/45 model); compatible with semi-trailer's air brake system

Brake Performance: Meets ECE R13 (UN Regulation on braking systems for commercial vehicles); stopping distance ≤ 15 meters at 60 km/h

6. Suspension Compatibility

Suspension Type: Compatible with mechanical leaf spring suspension (standard) or air suspension (optional)

Leaf spring suspension: 10–12 leaves per axle, spring steel material (60Si2Mn)

Air suspension: 2–4 airbags per axle (capacity 10–13 tons per airbag)

Shock Absorption: Optional hydraulic shock absorbers (for rough-road scenarios) to reduce vibration and tire wear

7. Material & Manufacturing

Axle Body Material: Forged 45# steel or 20CrMnTi; undergoes quenching and tempering (hardness HB 220–250) for high strength and toughness

Surface Treatment: Hot-dip galvanizing (Zn coating thickness ≥ 85 μm) or electrostatic spray painting (epoxy resin coating) for corrosion resistance; service life ≥ 5 years under normal use

Quality Testing: 100% dynamic balance test (residual unbalance ≤ 50 g·cm) and pressure test (for brake system, 0.8 MPa air pressure retention ≥ 5 minutes)

8. Installation & Adaptability

适配 Semi-Trailer Type: Flatbed semi-trailers, bulk cargo semi-trailers, container semi-trailers (20–40 ft containers)

Mounting Hole Specification: 8–12 M20×50 bolts per axle; bolt torque 550–650 N·m

Towing Pin Compatibility: Works with 50# or 90# towing pins (standard semi-trailer traction connections)

Weight per Axle: 180–220 kg (397–485 lbs); total three-axle weight 540–660 kg

Notes

Specifications may vary by manufacturer (e.g., BPW, SAF-Holland, CIMC) and custom requirements (e.g., off-road upgrades, cold-region adaptations). For precise data, refer to the manufacturer's technical datasheet or contact the supplier for tailored configurations.

Product Brief

The Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) is a heavy-duty, industry-compliant component engineered for sidebar-type three-axle semi-trailers. It integrates high-strength structural design, reliable load-bearing performance, and broad compatibility to meet the demands of logistics, construction, mining, and bulk cargo transportation. With a total three-axle load capacity of 30–39 metric tons, compliance with international standards (ISO 13041, ECE R13), and corrosion-resistant finishes, this axle ensures long-term durability and stable operation for both on-highway and light off-road scenarios. It is compatible with flatbed semi-trailers, container semi-trailers (20–40 ft), and bulk cargo trailers, making it a versatile choice for global trade clients.

Product Content Introduction

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) features a robust sidebar-integrated structure built with high-strength low-alloy steel (Q345B). The sidebar, with a thickness of 8–12 mm, provides exceptional load distribution and structural support, while the three axles are arranged with equal 1.3–1.5 meter spacing to ensure balanced weight bearing-effectively reducing tire wear and improving driving stability even when hauling heavy loads.

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) delivers outstanding load capacity to handle heavy-duty tasks. Each axle boasts a rated load of 10–13 metric tons, with a total three-axle load of 30–39 metric tons, and can withstand 120% of the rated static load during short-duration loading/unloading. This performance meets the needs of high-volume cargo transport, such as construction materials, mining ores, and large containers, without compromising structural integrity.

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) offers broad tire and rim compatibility for flexible configuration. It supports dual-wheel setups per axle (6 tires total) and works with common commercial tire sizes: 295/80R22.5, 11R22.5, 12R22.5 (for long-haul) and 14.00R20 (for heavy-duty off-road use). It is also compatible with 22.5×9.00-inch (standard) or 20×8.25-inch (heavy-duty) steel/aluminum alloy rims, adapting to different regional and operational requirements.

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) prioritizes braking safety with a high-performance pneumatic braking system. It comes standard with 420 mm diameter cast iron drum brakes (180 mm width) (disc brakes optional) and 30/30 or 30/45 pneumatic brake chambers, complying with ECE R13 regulations. The system ensures a stopping distance of ≤15 meters at 60 km/h, providing reliable control for downhill driving and heavy-load braking.

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) is designed for easy suspension 适配 and vibration reduction. It is compatible with both standard mechanical leaf spring suspension (10–12 leaves per axle, 60Si2Mn spring steel) and optional air suspension (2–4 airbags per axle, 10–13 tons capacity per airbag). Optional hydraulic shock absorbers further minimize vibration during rough-road travel, extending the axle's service life and protecting cargo.

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) ensures long-term durability through premium materials and surface treatment. The axle body is made of forged 45# steel or 20CrMnTi (quenched and tempered to HB 220–250 hardness), while the surface undergoes hot-dip galvanizing (Zn coating ≥85 μm) or electrostatic epoxy spray painting-resisting corrosion and ensuring a service life of ≥5 years under normal use. All units pass 100% dynamic balance tests (residual unbalance ≤50 g·cm) for smooth operation.

Sidebar Three-Axle Semi-Trailer Tire Axle (Model: SAT-360) offers hassle-free installation and broad semi-trailer compatibility. It uses 8–12 M20×50 bolts per axle (torque 550–650 N·m) for bolt-on or welded mounting to sidebar-type semi-trailer frames. It works with 50# or 90# standard towing pins and fits flatbed, container, and bulk cargo semi-trailers, reducing installation time and adapting to diverse client fleet configurations.

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