Product Introduction

Structure

This limiting pad is a rubber-metal composite component designed for heavy-duty truck suspension systems. It features a trapezoidal, high-density rubber body with an embedded metal plate, and four threaded metal studs protruding from the base for secure installation. The rubber surface is embossed with branding, part number (WG9725520727), and identification markings (ID:01175) for easy recognition and traceability.

Performance

Manufactured from high-grade, oil-resistant synthetic rubber and precision-formed metal components, this limiting pad delivers exceptional vibration damping, impact absorption, and resistance to aging and abrasion. It operates reliably in temperatures ranging from -40°C to 120°C, resisting degradation from road contaminants, oil, and UV exposure. The rubber body provides progressive stiffness, effectively limiting suspension travel and absorbing impact loads, while the metal studs ensure a secure, long-lasting connection.

Core Function

1. Serves as a critical impact-limiting component in suspension systems, limiting excessive suspension travel and preventing damage to chassis and suspension components.

2. Absorbs and dampens impact loads generated by road impacts and suspension bottoming, reducing noise and improving driver comfort.

3. Acts as a buffer between the suspension and chassis, protecting metal components from direct contact and reducing wear and fatigue.

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

Limiting Pad WG9725520727 Sinotruk – Heavy-Duty Suspension Bump Stop for HOWO Trucks

When your heavy-duty truck hits a pothole or carries an uneven load, the suspension system absorbs tremendous force. The Limiting Pad WG9725520727 Sinotruk acts as the silent guardian between your chassis frame and axle, preventing metal-to-metal contact that could damage critical components. Engineered as a rubber-metal composite bump stop, this OEM-grade limiting pad delivers reliable shock absorption and vibration dampening — keeping your fleet running smoothly while reducing costly downtime.

At Mettlead, we supply genuine-quality Sinotruk chassis parts directly from our factory in China. That means you get competitive pricing, fast lead times, and the exact specifications your trucks demand. Whether you are replacing a cracked or worn-out limiting pad or stocking up for preventive maintenance, this part is ready to ship.

Key Features and Benefits of the Limiting Pad WG9725520727

This isn’t just a block of rubber — it’s a precision-engineered suspension component built to withstand years of punishing road conditions. Here’s what makes it stand out:

• Rubber-Metal Composite Construction: A high-density, trapezoidal rubber body is bonded to an embedded metal plate, providing superior load distribution and long-lasting resilience under repeated compression.
• Four Threaded Metal Studs: The protruding studs on the base ensure secure, bolt-on installation to the chassis frame — no welding or special tools required.
• Embossed Identification Markings: The rubber surface features the part number (WG9725520727) and ID code (01175) for easy recognition, inventory management, and traceability.
• Excellent Vibration Dampening: The dense rubber compound absorbs impact energy effectively, protecting the frame, axle housing, and surrounding suspension components from premature wear.
• OEM-Equivalent Quality: Manufactured to match original Sinotruk specifications, so you can install with confidence knowing it fits perfectly and performs as expected.
• Extended Service Life: Resistant to oil, heat, and environmental aging, this limiting pad maintains its elasticity and structural integrity even in harsh operating conditions.

Technical Specifications

Below you’ll find the detailed parameters for this Sinotruk limiting pad. Every dimension and material specification has been verified against OEM standards to ensure a precise fit:

Application Scenarios – When Do You Need This Limiting Pad?

Understanding exactly when and where this part is used helps you make a confident purchasing decision. The Limiting Pad WG9725520727 is a chassis suspension component that serves a critical protective role in the following situations:

Compatible Truck Models

This limiting pad is designed to fit Sinotruk heavy-duty trucks, including the HOWO series, SITRAK models, and Steyr-platform vehicles equipped with the standard rear suspension configuration. If your truck uses the WG9725520727 part number in its BOM (Bill of Materials), this is the correct replacement.

Replacement Conditions

Over time, even the toughest rubber degrades. You should inspect and replace this limiting pad when you notice any of the following signs:

• Visible Cracking or Splitting: UV exposure, heat cycling, and oil contamination cause the rubber to crack. Once the surface integrity is compromised, the pad loses its shock-absorbing capacity.
• Fragmentation or Crumbling: If pieces of rubber are breaking away, the pad has reached the end of its service life and must be replaced immediately.
• Excessive Compression (Flattening): A pad that no longer returns to its original shape cannot provide adequate travel limitation, leading to harsh bottoming-out.
• Unusual Chassis Noise: Banging or clunking sounds during heavy loading or rough road conditions often indicate a worn or missing limiting pad.

System Category

This part belongs to the chassis suspension system. For more related components — including spring seats, U-bolts, shock absorbers, and stabilizer bushings — browse our complete Chassis Parts Category.

OEM/ODM Capability

Mettlead doesn’t just sell parts — we partner with distributors, fleet operators, and aftermarket brands worldwide. Our manufacturing and supply capabilities are designed to support your business growth:

• White-Label Packaging: Want your own brand on the box? We offer custom packaging solutions so you can build your brand identity in your local market.
• Custom Packaging Options: From individual poly bags to branded cartons with your logo, we adapt packaging to your specifications.
• Strict Quality Control: Every limiting pad undergoes material inspection, dimensional verification, and hardness testing before shipment. We don’t cut corners.
• Factory-Direct Pricing: By sourcing directly from our facility in China, you eliminate middlemen and enjoy better margins on every order.
• Flexible MOQ: Whether you need a sample batch or a full container load, we accommodate orders of all sizes.
• Fast and Reliable Delivery: With established logistics partnerships, we ship to Africa, the Middle East, Southeast Asia, South America, and beyond — on time.

Explore our full range of Sinotruk components on the Sinotruk Truck Parts page, or visit the dedicated Sinotruk HOWO Brand Page for a complete catalog.

Frequently Asked Questions (FAQ)

What exactly does the Limiting Pad WG9725520727 do in the suspension system?

Think of it as a cushioned barrier. When your truck’s axle travels upward under heavy load or impact, this pad stops the axle from slamming into the chassis frame. It absorbs that final burst of energy, protecting both the frame and the axle housing from damage. Without it, you’d experience harsh metal-to-metal contact that accelerates wear on expensive structural components.

How can I confirm this limiting pad fits my specific truck?

The most reliable method is to match the OEM part number. If your truck’s parts manual or existing component shows WG9725520727, this is the correct replacement. Additionally, this pad fits Sinotruk HOWO and SITRAK models with standard rear suspension configurations. If you’re unsure, send us your VIN or chassis number and we’ll verify compatibility for you.

What causes a limiting pad to fail prematurely?

Several factors contribute to early degradation. Constant overloading compresses the rubber beyond its design limits. Oil or diesel fuel leaking onto the rubber surface accelerates chemical breakdown. Extreme temperature fluctuations cause the material to harden and crack over time. Regular inspection during routine maintenance helps catch deterioration before it leads to chassis damage.

Is this an original Sinotruk part or an aftermarket replacement?

This is a high-quality aftermarket part manufactured to OEM specifications. It matches the original in material composition, dimensions, hardness, and mounting configuration. Many fleet operators prefer aftermarket alternatives because they deliver equivalent performance at a significantly lower cost — especially when replacing multiple units across a fleet.

How many limiting pads does a typical HOWO truck use?

Most Sinotruk HOWO models use multiple limiting pads across the rear suspension — typically two to four depending on the axle configuration (single rear axle vs. tandem). We recommend replacing all pads on the same axle simultaneously to ensure even load distribution and consistent performance.

Can I order a sample before committing to a bulk purchase?

Absolutely. We encourage buyers to evaluate quality firsthand. Sample orders are welcome, and we can ship them via express courier for fast delivery. Once you’re satisfied with the quality, we’ll work with you on volume pricing for larger orders.

Get a Competitive Quote Today

Ready to secure reliable, factory-direct pricing on the Limiting Pad WG9725520727 Sinotruk? Whether you need 10 pieces or 10,000, our team responds to inquiries within 24 hours with pricing, lead time, and shipping options tailored to your location.

Here’s what to include in your inquiry for the fastest response:

1. Part number confirmation (WG9725520727)
2. Required quantity
3. Destination country/port
4. Any custom packaging requirements

Contact Us Now to request your quote — our sales team is standing by to support your next order.