Product Introduction

Structure

This leaf spring single plate is a precision-formed high-strength steel component designed for heavy-duty truck leaf spring suspension systems. It features a long, flat profile with a slight camber, precision-cut edges, and a central mounting hole for installation. The ends are formed into cylindrical spring eyes for pivot connection, and the surface is finished with a dark anti-corrosion coating. Markings such as “18X90” and part numbers are clearly visible for easy identification and traceability.

Performance

Manufactured from premium-grade spring steel (e.g., 60Si2Mn) and subjected to controlled heat treatment, this single plate delivers exceptional tensile strength, fatigue resistance, and consistent spring rate. It is designed 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.

Core Function

1. Serves as a primary load-bearing element within the leaf spring assembly, contributing to the overall spring rate and load capacity of the suspension system.

2. Works in conjunction with other leaf plates to absorb and dissipate road impacts and vibrations, ensuring a smooth, stable ride.

3. Maintains proper suspension geometry, preventing excessive deflection and ensuring consistent vehicle handling and stability.

4. Enhances vehicle safety and durability by providing a robust, reliable load-bearing solution that can withstand the extreme conditions of heavy-duty operation, reducing the risk of component failure and improving overall reliability.

Leaf Spring Single Plate WG9725520072-1 Sinotruk – Heavy-Duty Suspension Component

When your heavy-duty truck’s suspension demands reliable performance under extreme loads, the Leaf Spring Single Plate WG9725520072-1 Sinotruk delivers exactly that. Engineered from premium high-strength steel and precision-formed to OEM specifications, this single plate leaf spring restores your suspension system to peak condition. Whether you’re replacing a fractured plate or addressing elasticity degradation, this component ensures your fleet stays on the road — and on schedule.

At Mettlead, we supply this genuine-spec suspension part directly from our factory in China, which means you get competitive pricing without compromising on quality. As a trusted global supplier of SINOTRUK, HOWO, and other Chinese brand truck parts, we understand that procurement managers need accuracy, reliability, and fast turnaround. That’s precisely what we deliver.

Key Features and Benefits of the Leaf Spring Single Plate WG9725520072-1

This isn’t just a piece of steel — it’s a carefully engineered suspension component that keeps heavy-duty trucks performing safely under demanding conditions. Here’s what sets it apart:

• High-Strength Steel Construction: Manufactured from premium-grade spring steel, this single plate withstands repeated stress cycles and heavy payloads without premature fatigue or fracture.
• Precision-Formed Camber Profile: The slight camber is engineered to exact OEM tolerances, ensuring proper load distribution and ride height restoration after installation.
• Cylindrical Spring Eyes: Both ends feature precisely formed spring eyes that provide smooth pivot connections, reducing wear on bushings and mounting hardware.
• Central Mounting Hole: A precision-cut center bolt hole guarantees accurate alignment within the leaf spring pack, preventing lateral shifting during operation.
• Dark Anti-Corrosion Coating: A durable surface finish protects against rust, moisture, and road chemicals — extending service life even in harsh operating environments.
• Clear Part Identification: Markings including “18X90” and the OEM part number WG9725520072-1 are clearly stamped for easy verification, inventory management, and traceability.
• Direct OEM Replacement: Designed as a drop-in replacement, this plate eliminates guesswork during installation and reduces vehicle downtime significantly.

In other words, every detail of this leaf spring single plate is optimized for durability, precision fitment, and long-term cost efficiency — exactly what fleet operators and procurement teams need.

Application Scenarios – Where This Leaf Spring Single Plate Fits

Understanding where and when to use this component helps you make confident purchasing decisions. The Leaf Spring Single Plate WG9725520072-1 is specifically designed for the following applications:

• Compatible Truck Models: Sinotruk HOWO heavy-duty trucks and related SINOTRUK platform vehicles equipped with multi-leaf spring rear suspension systems.
• Component Type: Single plate leaf spring — functions as an individual plate within the leaf spring assembly pack.
• System Category: Chassis suspension system — specifically the leaf spring suspension configuration used in heavy-duty commercial vehicles.
• Replacement Scenarios: Ideal for replacing plates that have suffered fracture due to overloading, fatigue cracking from prolonged use, or elasticity degradation that causes sagging and uneven ride height.
• Maintenance Context: Commonly required during scheduled suspension overhauls, post-accident repairs, or when drivers report abnormal vehicle leaning and reduced load-carrying stability.

If your Sinotruk HOWO trucks are showing signs of suspension fatigue — uneven tire wear, chassis sagging, or reduced handling stability — this leaf spring single plate is likely the component you need. Browse our full range of
chassis suspension parts
for complementary components.

Technical Specifications

Accurate specifications matter when you’re sourcing parts for a specific application. The following table provides the key parameters for the Leaf Spring Single Plate WG9725520072-1 Sinotruk:

Note: If you require additional dimensional data or material certifications for this leaf spring single plate, our technical team is ready to assist. Simply
contact us
with your specific requirements.

OEM/ODM Capability – Tailored to Your Business Needs

We understand that different markets have different requirements. That’s why Mettlead offers flexible manufacturing and packaging solutions for the Leaf Spring Single Plate WG9725520072-1 and our entire product range:

• White-Label Packaging: Want to sell under your own brand? We provide neutral or custom-branded packaging that aligns with your company identity — no minimum branding fees, just professional presentation.
• Custom Packaging Solutions: Whether you need individual protective wrapping for single plates or bulk packaging optimized for container shipping, we adapt to your logistics requirements.
• Strict Quality Control: Every leaf spring single plate undergoes rigorous inspection for dimensional accuracy, surface finish integrity, camber consistency, and material hardness before leaving our facility.
• Flexible Order Quantities: From sample orders for testing to bulk procurement for large fleets, we accommodate orders of all sizes with consistent quality and competitive factory-direct pricing.
• Technical Support: Our engineering team can provide fitment guidance, cross-reference verification, and compatibility confirmation to ensure you’re ordering the right part every time.

Explore our complete
Sinotruk HOWO truck parts catalog
to discover the full range of components available for your sourcing needs.

Frequently Asked Questions – Leaf Spring Single Plate WG9725520072-1

What trucks does the Leaf Spring Single Plate WG9725520072-1 fit?

This leaf spring single plate is designed specifically for Sinotruk HOWO heavy-duty trucks that use multi-leaf spring suspension systems. It serves as a direct OEM replacement, so it fits without modification on vehicles originally equipped with part number WG9725520072-1. If you’re unsure about compatibility with your specific model, our team can cross-reference your VIN or chassis number.

How do I know when this leaf spring single plate needs replacement?

Several signs indicate it’s time to replace your leaf spring plate. Look for visible cracks or fractures on the plate surface, noticeable sagging on one side of the truck (indicating elasticity loss), unusual clunking noises from the suspension during loading, or uneven tire wear patterns. Additionally, if the truck has exceeded its recommended service interval for suspension components, proactive replacement prevents unexpected breakdowns.

What does the “18X90” marking on this leaf spring single plate mean?

The “18X90” marking indicates the cross-sectional dimensions of the plate: 18mm thickness and 90mm width. These dimensions are critical for ensuring the plate provides the correct load-bearing capacity and spring rate within the leaf spring assembly. Always verify these dimensions match your existing plates when ordering replacements.

Can I replace just one plate in the leaf spring pack, or should I replace the entire assembly?

In many cases, replacing a single fractured or fatigued plate is both practical and cost-effective — especially when the remaining plates in the pack are still within acceptable service condition. However, if multiple plates show signs of fatigue, cracking, or significant elasticity loss, replacing the complete assembly ensures balanced performance. Our technical team can advise based on your specific situation.

What anti-corrosion protection does this leaf spring single plate have?

The plate features a dark anti-corrosion surface coating that protects against oxidation, moisture penetration, and chemical exposure from road salts and debris. This coating significantly extends service life, particularly for trucks operating in humid, coastal, or winter road conditions. For maximum longevity, inspect the coating periodically and address any chips or exposed areas during routine maintenance.

How is this leaf spring single plate packaged for shipping?

Each plate is carefully packaged with protective materials to prevent surface damage and coating abrasion during transit. For bulk orders, we use reinforced packaging optimized for container shipping. Custom packaging and white-label options are also available upon request.

Ready to Source Your Leaf Spring Single Plate WG9725520072-1?

Getting the right suspension parts at the right price shouldn’t be complicated. As a factory-direct supplier with years of experience serving global markets, Mettlead makes procurement straightforward:

• Competitive factory-direct pricing — no middlemen, no inflated margins
• Fast and reliable delivery — because downtime costs more than parts
• Flexible, secure payment methods — tailored to international trade
• Factory visits welcome — see our quality control process firsthand

Take the next step today. Whether you need a quote for the Leaf Spring Single Plate WG9725520072-1, want to verify fitment for your fleet, or need to discuss bulk pricing — our team responds quickly and professionally.

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Contact Us Now to Request a Quote

You can also browse our comprehensive
Sinotruk truck parts
catalog to find additional components for your next order. The more you consolidate, the more you save on shipping and handling.