I. A Leaf Spring Supports More Than Just the Vehicle Body
If you have ridden a tricycle bumping along country dirt roads, or seen heavy-duty trucks travelling fully loaded through mountainous terrain, you must have experienced that sensation of “the whole vehicle shaking”. One of the core components determining ride quality is the leaf spring — the most critical elastic element within the vehicle suspension system. Though seemingly a traditional industry, the leaf spring sector is undergoing profound transformation. In 2025, the global leaf spring assembly market reached approximately 24.3 billion RMB, with China accounting for nearly 40% of the total market share. Driven by electrification and lightweight trends in commercial vehicles, the leaf spring industry is experiencing a pivotal transition from conventional manufacturing to high-performance material applications. Within this sector stands an enterprise with a 30-year legacy — Hengsaier Auto Parts.
II. Thirty Years, Focused on One Single Thing
Founded in 1996 and headquartered in Changge, Henan, Hengsaier has avoided blind expansion over the past three decades, consistently focusing on the niche leaf spring segment. Today, Hengsaier serves as a member unit of the Suspension Committee of China Association of Automobile Manufacturers and a member of the China Heat Treatment Association. The company holds 37 patented technologies for leaf spring production and inspection, including 5 invention patents, and operates an R&D center for variable cross-section vehicle suspensions. It has obtained ISO9000, IATF16949 and other quality system certifications, with products sold widely both domestically and overseas. Notably, Hengsaier led the formulation of the group standard *Technical Specifications for Chassis Leaf Springs of Autonomous Logistics Vehicles*. This means in the emerging field of leaf springs for autonomous vehicles, Hengsaier is not merely a participant, but a rule-setter. In June 2025, the company was granted the patent for “Automotive Leaf Spring Applicable to Autonomous Logistics Vehicles”. Centered on lightweight design, this patented product features simple structure, compact installation footprint and extended service life.
III. Dual-line Layout: Light-Duty + Heavy-Duty, Covering Full Application Scenarios
Hengsaier adopts a collaborative dual-company layout:
– Hengsaier Auto Parts Co., Ltd.: Specializes in light-duty leaf springs. Products are widely used for tricycles, trailers, autonomous vehicles and special vehicles.
– Henan Hezecheng Auto Parts Co., Ltd.: Focuses on heavy-duty leaf springs with an annual output of 50,000 tons. It mainly manufactures constant cross-section and variable cross-section leaf springs for heavy trucks, engineering vehicles and other heavy-load scenarios.
This “light-duty + heavy-duty” dual strategy enables Hengsaier to deliver solutions for full-scenario demands ranging from tricycles and heavy trucks to manned and autonomous vehicles.
IV. More Than Manufacturing — Pursuit of Superior Quality
Hengsaier boasts several remarkable technological highlights:
1. Variable Cross-Section Leaf Spring Technology
Compared with traditional constant cross-section leaf springs, variable cross-section leaf springs save raw material and reduce dead weight under equivalent stress, delivering smoother vehicle handling. Few-leaf variable cross-section leaf springs can cut mass by 30%~50% compared with traditional multi-leaf springs. This technology carries great value amid the rising lightweight requirements for new energy commercial vehicles.
2. Patented Leaf Spring for Autonomous Vehicles
Hengsaier’s self-developed leaf spring for autonomous logistics vehicles adopts a three-leaf structure. It guarantees load capacity while realizing lightweight and compact design — a critical advantage for space-constrained autonomous vehicle chassis.
3. Robust Quality Assurance System
Every link follows strict technical standards and inspection procedures: raw materials adopt hot-rolled spring flat steel complying with GB/T1222; heat treatment hardness is controlled within the range of 41HRC~48HRC; parameters including camber, stiffness and fatigue life are all rigorously tested.
V. Product Portfolio: Solutions for Diverse Needs
Hengsaier offers an extensive range of product models. Key product lines are listed below:
Light-Duty Leaf Spring Series (for pickup trucks, tricycles, trailers, autonomous vehicles, etc.)
Toyota: 48210-26340-00, MB 035106-00, 48210-OK240-00, 48210-36150-00, 48110-2030-00, 48110-60391, 48210-60742, 48210-35830B, 48210-830T0, 48210-35670C, 48110-35230A, 48210-OK010, 48210-04220-B, 48210-35651, 48120-35120, 48210-35830, 48210-35311, 48110-35210-00, 48211-60209-1, 48212-60209-2, 48210-60270/240, 48211-60240-1, 48212-60240-2, 48110-60160, 48111-60160-1, 48112-60160-2, 48210-60644, 48210-60644-4, 48210-60744-3, 48112-80062, 48220-5519, 48210-26660, 48210-OK010, 48210-0K020, 48210-60430, 48210-26340, 48110-60062, 48111-60062, 48110-60250, 48210-60270, 48201-3C020, 48210-54060, 48210-13261-1, 48110-6980, 48110-60391, 48510-2341, 48510-2341-R3, 48110-35111, 48210-OK070, 48210-OK080, 48210-OK510-00, etc.
ISUZU: 89709-65442, 89709-65760, NPR55, 1-51340-010-0 HA, 51310-7800 RA, 8-94101-345-0 FA, 8-94118-505-1 RA, 8-94118-505-1 HA, 8-94343-082-M FA, 8-94343-130-0 RA, 8-97092-445-1 FA, 1-51300-333-2 RA, 1-51300-333-2 HA, 8-97070-508 M RA, 8-97070-508 M HA, 8-97092-445 M FA, TD50M3, 1-51110-530-5 FA, 8-97092-450-M FA, 1-51130-245-0 FA, 1-51130-433-0 FA, 1-51300-524-0 HA, 1-51300-524-0 RA
NISSAN: 54010-G5500MH, 55020-S1274, 55020-Z5106, 55020-Z5176, 54010-Z5263, 55020-Z5176A, 54010-Z5266, 55020-G6105, 55020-31Z02, 55020-Z0073A, 54010-01Z17, 54010-1T700, 54010-Z2006A, 54010-Z3007, 54011-99117, 55020-1T400, 55020-Z2302, 55020-Z9001, CW53-02Z61, 55020-Z0003, 54010-31Z61, 55010-C1301, 55010-Z3001, 55100-4F000, 55020-EB300, etc.
American trailer leaf springs: TE30, UNA220, UNA212, UNA218, UNA111, UNA113, UNA221, UNA222, UNA053, UNA054, UNA055, UNA169, UNA115, UNA223, UNA216, UNA217, UNA178, UNA269, UNA270, UNA160, UNA161, UNA230, UNA231, UNA232, etc.
Heavy-Duty Leaf Spring Series (for heavy trucks, engineering vehicles, etc.) TRA2726, TRA2727, TRA2728, TRA2260, TRA2256, TRA3319, TRA2297, TRA2270, TRA2752, TRA2754, TRA2740, TRA2741, TRA021, TRA023, TRA699, TRA693, TRA2160, TRA3343, TRA2726HD, TRA2727HD, TRA2728HD, TRA3330HD, TRA2297HD, TRA3319HD, TRA696, TRA3340, TRA3341, TRA2291, TRA2705, TRA1492, TRA1150, TRA1153, TRA3384, TRA051, TRA038, TRA035, TRA0073, TRA3603, TRA-089, TRA2732, TRA2753, 46-1240, 46-1244, 46-1246, 46-1280, 46-1302, 46-1406, 46-1432, 46-220, 50-215, 50-267, 50-299, 50-301, 50-301HD, 50-313, 55-067, 55-1192, 55-144, 55-154, 55-896, 55-930, 59-400, 62-147, 62-155, 62-830, 62-965, 62-968, etc.
Whether you are a tricycle manufacturer, trailer maker, autonomous vehicle R&D team or heavy truck supporting enterprise, you can find matching product solutions here. If you have inquiries or need technical communication, Hengsaier will deliver satisfying solutions. whatsapp+86 18837405116 Email：[email protected]