Product Introduction

This rear leaf spring is a multi-leaf, heavy-duty suspension component designed for heavy-duty trucks. It consists of multiple high-strength steel leaves of graduated lengths, stacked and clamped together to form a curved, load-bearing structure. The entire assembly is finished with a dark anti-corrosion coating, and marked with specifications (e.g., “25×90”) and part numbers for easy identification and traceability.

Performance

Manufactured from premium-grade spring steel (e.g., 60Si2Mn) and subjected to controlled heat treatment, this leaf spring delivers exceptional tensile strength, fatigue resistance, and consistent spring rate. It is engineered to withstand the extreme dynamic loads, impacts, and torsional forces encountered in heavy-duty operation, maintaining its structural integrity in temperatures ranging from -40°C to 120°C. The anti-corrosion coating provides superior protection against rust, salt spray, and chemical exposure, ensuring long-term durability in diverse operating environments. The multi-leaf design offers progressive stiffness, optimizing both ride comfort and load-carrying capacity.

Core Function

1. Serves as the primary load-bearing and suspension component for the rear axle, supporting the vehicle’s weight and providing a smooth, stable ride.

2. Absorbs and dissipates road impacts and vibrations, reducing stress on chassis and suspension components and extending their service life.

3. Maintains proper ride height and suspension geometry, ensuring consistent vehicle handling and stability, especially under heavy loads or during cornering, braking, and acceleration.

4. Works in conjunction with shock absorbers to control excessive suspension movement, preventing wheel hop and maintaining tire contact with the road surface for improved traction and safety.

Rear Leaf Spring WG9725520283 Sinotruk – Heavy-Duty Suspension Component for HOWO Trucks

When your heavy-duty truck faces punishing road conditions day after day, the rear leaf spring is the unsung hero that keeps your chassis stable and your cargo safe. The Rear Leaf Spring WG9725520283 is a genuine-spec, multi-leaf suspension assembly engineered specifically for Sinotruk HOWO heavy trucks. Built from high-strength alloy steel with a durable anti-corrosion coating, this component delivers the load-bearing capacity and fatigue resistance that long-haul and heavy-load operations demand. Moreover, as a factory-direct supplier, Mettlead offers you competitive pricing without compromising on quality — so you can keep your fleet running and your maintenance budget under control.

Key Features and Benefits of Rear Leaf Spring WG9725520283

This Sinotruk rear leaf spring isn’t just a replacement part — it’s a performance upgrade for your truck’s suspension system. Here’s what sets it apart:

• Multi-Leaf, Graduated Design: Multiple steel leaves of progressively shorter lengths work together to distribute stress evenly, which significantly extends service life under heavy payloads.
• High-Strength Alloy Steel Construction: Each leaf is manufactured from premium-grade spring steel (25×90 mm cross-section), heat-treated for optimal hardness and elasticity. As a result, the assembly resists permanent deformation even under extreme loads.
• Anti-Corrosion Surface Coating: A dark, industrial-grade protective finish shields the entire assembly from moisture, road salt, and chemical exposure — ensuring reliable performance in harsh environments.
• Precise OEM Fitment: Manufactured to match the original Sinotruk specifications for part number WG9725520283, this leaf spring bolts directly into place without modifications. Consequently, installation time and labor costs are minimized.
• Clear Part Marking for Traceability: Every assembly is stamped with specifications and part numbers, making inventory management and quality verification straightforward for fleet managers.
• Enhanced Ride Stability: The curved, load-bearing structure absorbs road shocks effectively, protecting both the chassis frame and the cargo from vibration damage during transit.

Technical Specifications

Below you’ll find the detailed parameters for the Rear Leaf Spring WG9725520283 Sinotruk. These specifications ensure you’re ordering the exact component your truck requires:

Application Scenarios

Understanding when and where this rear leaf spring fits is essential for making the right purchasing decision. Here are the primary application scenarios:

• Compatible Truck Models: This leaf spring assembly is designed to fit Sinotruk HOWO heavy-duty trucks equipped with the standard rear suspension configuration. It serves as a direct replacement for the original WG9725520283 component.
• Chassis Suspension Maintenance: When your truck’s rear leaf spring shows signs of fatigue — such as sagging, cracking, or uneven ride height — timely replacement with this assembly restores proper load distribution and driving stability.
• Fleet Overhaul and Preventive Maintenance: For fleet operators managing multiple Sinotruk vehicles, stocking this rear leaf spring ensures minimal downtime when scheduled maintenance or unexpected failures occur.
• Heavy-Load and Long-Haul Operations: Trucks operating in mining, construction, or long-distance logistics benefit from the superior fatigue resistance this multi-leaf design provides.

Looking for more Sinotruk chassis and suspension components? Browse our complete chassis parts catalog or explore the full range of Sinotruk HOWO truck parts we supply.

OEM/ODM Capability

At Mettlead, we understand that different markets have different requirements. That’s why we offer flexible OEM and ODM services tailored to your business needs:

• White-Label Packaging: We can supply the Rear Leaf Spring WG9725520283 with neutral packaging or your own branded labels — ideal for distributors building their own aftermarket brand identity.
• Custom Packaging Solutions: Whether you need specific box dimensions, multilingual labels, or barcoded packaging for warehouse scanning, our team accommodates your specifications.
• Strict Quality Control: Every leaf spring assembly undergoes rigorous inspection — including dimensional checks, hardness testing, and surface coating verification — before it leaves our facility.
• Factory-Direct Pricing: By sourcing directly from our manufacturing base in China, you eliminate middlemen and secure the most competitive unit costs for bulk orders.
• Comprehensive Product Range: Beyond this single part, we supply a full catalog of Sinotruk truck parts, including SITRAK, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON components — making us your one-stop sourcing partner.

Frequently Asked Questions

What trucks does the Rear Leaf Spring WG9725520283 fit?

This rear leaf spring is specifically designed for Sinotruk HOWO heavy-duty trucks that use the OEM part number WG9725520283 in their rear axle suspension system. Before ordering, we recommend verifying the part number against your truck’s chassis documentation to confirm compatibility.

How can I tell if my rear leaf spring needs replacement?

Several signs indicate a worn or failing rear leaf spring. Look for visible cracks or fractures on individual leaves, noticeable sagging on one side of the truck, uneven tire wear on the rear axle, or excessive bouncing and instability when the truck is loaded. If you observe any of these symptoms, replacing the assembly promptly prevents further damage to your chassis frame and axle components.

What material is this leaf spring made from, and how does it resist corrosion?

The assembly is manufactured from high-strength alloy spring steel with a 25×90 mm leaf cross-section. Each leaf is heat-treated to achieve the ideal balance of hardness and flexibility. Additionally, the entire assembly receives a dark anti-corrosion coating that protects against moisture, road chemicals, and oxidation — extending the component’s operational lifespan considerably.

Is this an OEM-quality part or an aftermarket alternative?

This rear leaf spring is manufactured to OEM specifications, meaning it matches the original Sinotruk part in dimensions, material grade, and performance characteristics. It functions as a direct, bolt-on replacement without any need for modification or adaptation.

How should I store rear leaf springs before installation?

Store the leaf spring assembly in a dry, covered area away from direct moisture and ground contact. Keeping it in its original packaging until installation helps preserve the anti-corrosion coating. Furthermore, avoid stacking heavy objects on top of the assembly to prevent pre-loading deformation.

Can I order this part with custom or white-label packaging?

Yes. Mettlead offers white-label and custom packaging options for distributors and resellers. Simply specify your packaging requirements when you submit your inquiry, and our team will provide a tailored solution.

Get Your Competitive Quote Today

Ready to secure factory-direct pricing on the Rear Leaf Spring WG9725520283 Sinotruk? Whether you need a single unit for urgent maintenance or bulk quantities for your distribution network, our team responds quickly with accurate quotes and reliable lead times.

Take the next step — contact us now to request a quote, ask technical questions, or discuss custom packaging for your market. We also welcome factory visits for buyers who want to verify our quality control processes firsthand.