Durable Customizable Z-Type Leaf Spring for Tank Trucks and Trailers

Zhengzhou Haishuo Auto Parts Co., Ltd. is a professional manufacturer of heavy-duty truck and trailer suspension components, located in Zhengzhou, Henan Province, China. Officially established in August 2016, our factory has focused on the R&D, production, sales and international export of various types of leaf springs for over 8 years. The factory covers an area of 3600 square meters, with a long-term standing inventory of more than 4000 tons of leaf springs and supporting accessories, enabling fast delivery of spot goods and stable mass production supply. Our products are exported to Southeast Asia, Africa, the Middle East, Eastern Europe, South America and other global markets, with stable repeat customer resources and good market reputation.

Product Name: Heavy Duty Z-Type Leaf Spring / Tank Truck & Trailer Suspension Spring

Factory Specification: Customizable

Application: Designed for Tank Trucks, Semi-Trailers and Specialized Transport Vehicles

Condition: Brand New, 100% Tested

This Z-Type Leaf Spring is precision-engineered for heavy-duty tank trucks, semi-trailers and specialized transport vehicles. With its unique Z-shaped structure, it provides excellent load distribution and stability, widely used in the rear suspension system of various heavy-duty transport equipment. It supports customized specifications to match different trailer models and working condition requirements, realizing perfect fitting and direct replacement.

 

🛠️ Technical Specifications & Materials

We adopt high-quality raw materials from authoritative domestic steel mills, optional 52CrMoV4, 60Si2Mn and 55CrMnA high-strength spring steel. All products undergo professional quenching and tempering heat treatment, matched with shot peening strengthening and electrophoretic black anti-rust coating. The salt spray resistance test reaches more than 300 hours, with CNC precision machining and 100% full-size inspection before delivery. All dimensions, camber and bearing capacity fully meet standard replacement requirements for heavy-duty truck working conditions.

 

✅ Why Choose Haishuo?

We support factory direct sales to eliminate middleman premiums. With sufficient stock inventory and standardized production processes, we can meet both small-batch trial orders and large-batch bulk orders. Strict fatigue resistance treatment effectively avoids cracking, deformation and sagging during long-term heavy-load operation. The product retains consistent installation hole positions and overall dimensions, realizing direct replacement and no modification required, greatly reducing vehicle maintenance time and cost.

 

📦 Packaging & Shipping​

We adopt professional standard export packaging for all leaf spring products, tightly bundled with high-strength steel strips, fully wrapped with thick anti-rust plastic and waterproof film, then stably loaded on fumigated solid wooden pallets to avoid deformation, rust and damage during long-distance sea transportation. We support flexible delivery solutions to meet diverse customer needs.  Located in Zhengzhou, Henan, we enjoy superior geographical logistics advantages. We mainly deliver goods from core domestic ports including Qingdao Port , Tianjin and LianYun  Port, and support multiple trade terms such as FOB, EXW, CIF, CFR and DDP. With long-term cooperative logistics providers, we ensure stable shipping schedules, safe cargo transportation and cost-effective logistics services for global clients.​

Why Choose Our Leaf Springs

• Manufactured using high-strength alloy steel (SUP9 / 60Si2Mn)
• Heat-treated for improved hardness and fatigue resistance
• Shot peening surface treatment for longer service life
• Strict load and fatigue testing before shipment
• OEM interchangeable fitment with Dongfeng systems
• Stable performance under heavy-duty working conditions

FAQ

Q1: Is this part OEM or aftermarket?
A: It is an OEM-compatible replacement designed for Dongfeng truck suspension systems.

Q2: What material is used in this leaf spring?
A: High-strength alloy steel such as SUP9 or 60Si2Mn.

Q3: Can you produce customized leaf springs?
A: Yes, OEM and customized production is available.

Q4: What is your delivery time?
A: Typically 20–30 days depending on order quantity.

Q5: What vehicles is it compatible with?
A: It is suitable for various Dongfeng heavy-duty truck platforms.

Common Problems of Worn Leaf Springs

Vehicle tilting or sagging on one side
Reduced load-carrying capacity
Excessive vibration during driving
Visible cracks or deformation on spring leaves

When to Replace Leaf Springs

Leaf springs should be replaced when fatigue cracks, deformation, or reduced elasticity are observed. Delayed replacement may affect vehicle safety and suspension performance.

🤝 Our Service Guarantee​

We provide personalized customized processing according to customer drawings and samples, supporting non-standard product customization. All products enjoy a 12-month manufacturer quality warranty. Our professional international sales team provides fast online response and one-stop purchasing consulting service, with rich export experience to serve global truck parts distributors and maintenance merchants.​

 

📝 Note to Buyer​

To avoid wrong purchase, please confirm the factory model  or provide your vehicle VIN code and truck model information.

Contact Zhengzhou Haishuo for a quote and experience reliable suspension solutions!