Products
Heavy-Duty Air Suspension Trailing Arm Kits
Source high-performance air suspension trailing arm kits from Truecasteng. Manufactured with premium 52CrMnMoV spring steel, IATF 16949 certified, and tested for 2M+ cycles. Ideal for heavy-duty trucks, luxury coaches, and specialty trailers. Contact us for OEM/ODM customization & wholesale pricing.
Colour: Original / Black
Materials: Spring Steel /52CrMnMoV
Production Processes: Hot Rolling / Forging Process
Heat Treatment: Normalizing, Annealing, Quenching, Tempering
Surface Finish: Shot Blasting, Polishing, Baking Varnish
Certificates: IATF16949
Transport Package: Wooden Case
Delivery Time: 15-20 Days
High-Performance Heavy-Duty Trailer Air Suspension Trailing Arms
Truecasteng offers a premium line of air suspension trailing arms engineered to deliver exceptional load distribution, durability, and ride comfort for commercial vehicles and heavy-duty trailers. As a critical link between the chassis and axles, our trailing arms ensure perfect wheel alignment and structural integrity under the most demanding road conditions.
1. Technical Specifications
| Product Name | Custom Heavy-Duty Trailer Air Suspension Trailing Arms |
| Working length (L) | 38.2″ [970 mm] |
| Front end length (L1) | 19.6″ [500 mm] |
| Rear end length (L2) | 12.6″ [320 mm] |
| Total weight | 1211b /55 KG |
| Number of leaves | 2 |
| Tensile Strength(MPa) | ≥1400 |
| Yield Strength(MPa) | ≥1200 |
| Impact (J) | ≥45 |
| Hardness (HB) | 380-430 |
| Total thickness(H) | 3.22″ [82 mm] |
| Free camber height(H1) | 5.9″ [150 mm] |
| Spring Eye diameter (D) | 2.36″ [60 mm] |
| Bush in diameter (D1) | 0.96″ [24.5 mm] |
| Width (W) | 3.93″ [100 mm] |
| Materials | 51CrV4/52CrMoV4/60CrMo3-3 |
| Production Processes | Hot Rolling/ Forging Process |
| Certificates | IATF 16949 |
| Heat Treatment | Normalizing, Quenching, Tempering |
| Yield Strength | ≥ 1100 MPa |
| Tensile Strength | 1300 – 1500 MPa |
| Elongation | ≥ 10% |
| Fatigue Life | 2 x 10^6 cycles at 80% WLL |
| Operating Temperature | -40°C to +120°C |
| Surface Finish | SAE J444 Shot Blasting / Precision Grinding (Ra 1.6um) / Custom RAL Powder Coating |
2. Material Excellence & Engineering
2.1 Premium 52CrMnMoV Spring Steel
We use only the highest-grade 52CrMnMoV alloy spring steel, renowned for its unmatched mechanical properties and superior fatigue resistance.
- Extreme Durability: Capable of withstanding over 2,000,000 load cycles at design capacity.
- Climate Resilience: Excellent impact toughness (Charpy V-notch ≥40J at -20°C) ensures reliable performance in extreme cold.
2.2 Advanced Manufacturing Process
- 15,000-Ton Hydraulic Forging: Optimizes grain structure along the component’s contours, completely eliminating weak points.
- Precision CNC Machining: Achieves tight tolerances of ±0.15mm on all critical surfaces.
- Rigorous Thermal Processing: Includes a strictly controlled heat treatment cycle—Normalizing (900-950°C), Oil Quenching (850°C), and Tempering (450-550°C)—to achieve the ideal balance of hardness (HRC 38-42) and toughness.
3. Quality Assurance & Global Certifications
At Truecasteng, reliability is guaranteed through our 100% rigorous quality control workflow, including CMM dimensional inspection, ultrasonic flaw detection, and hardness mapping.
- IATF 16949 Certified manufacturing facility.
- ECE R55 compliant for European trailer standards.
- FMVSS 571.224 compliant for the US market.
- ISO 4038 hydraulic testing verified for structural integrity under load.
- 100% Material Traceability maintained throughout production.
4. Applications
Our are air suspension trailing arms are the preferred choice for heavy-duty applications globally:
- Commercial Trucks & Luxury Coaches: Where superior ride quality and stability are paramount.
- Specialized & Heavy-Duty Trailers: Engineered for high load-bearing precision.
- Military & Heavy Equipment Transporters: Proven consistency in extreme, high-stress environments.
5. Customization & Delivery
5.1 OEM/ODM Customization Services
We understand that different fleets and markets have unique requirements. Truecasteng offers extensive custom options:
- Alternative material grades for specialized environments.
- Custom lengths, geometries, and configurations.
- Specific bushing or bearing integrations based on your technical drawings.
5.2 Packaging & Supply Chain Reliability
- Safe Transit: Shipped in heavy-duty wooden crates with VCI corrosion protection and custom foam inserts.
- Ready for Assembly: Complete hardware kits are included for efficient installation.
- Lead Time: Standard production lead time is 15-20 days, with expedited air freight options available for urgent wholesale demands.
6 Looking for a Reliable Suspension Component Manufacturer?
Truecasteng offers the complete product range for spring, truck suspension, steering, driveline, coupling, and hitch product lines. These parts are unmatched in their material, quality and operation. You can find everything you need under one roof. With unwavering precision during manufacturing, our leaf springs meet the highest quality standards and are engineered to withstand even the harshest road conditions. Rigorous quality control checks guarantee their reliability and longevity.
Contact Our Engineering Team for a Wholesale Quote & Technical Blueprint Review !
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