What is the warranty period?

We provide a standard 1-year warranty for the full suspension, with an optional 2-year extended warranty available at extra cost.

What certifications does the product have?

The product is certified to ISO 9001 and TS 16949 standards. SGS and TUV certifications are also available as optional extras.

What is the minimum order quantity?

The minimum order quantity is 1 piece.

Semi-Trailer Tractor Parts 12t-25t Leaf Spring Adjustable Spring Shock Absorbing Mechanical Suspension

Name: Semi-Trailer Tractor Parts 12t-25t Leaf Spring Adjustable Spring Shock Absorbing Mechanical Suspension
Brand: Shandong Weierqi Vehicle Parts Co.,Ltd
SKU: 2287615345

Shandong, ChinaShandong Weierqi Vehicle Parts Co.,Ltd

US$200.00-500.00

100 Pieces

Product profile

Customization

Available

Loading Weight

5000lbs

Material

Steel

Model NO.

Mechanical Suspension

Number of Axles

Tandem Axle Suspension

Type

Air Suspension

Purpose

for Replace/Repair

Application

Trailer Truck Used

No Load Dimension

381mm-440mm

Tent Type

Simple

Height of Towing Plate

1180mm/1210mm/1230mm/1250mm

Transport Package

Wooden Box

Specification

Air Bag

Trademark

WEQ

Origin

China

Production Capacity

200sets/Month

Key features

High-Strength Steel Construction: Hangers made of Q345 high-strength steel; springs are premium alloy steel with heat treatment.

Customizable Spring Configuration: Spring quantity adjustable from 6 to 16 pieces based on specific load requirements.

Versatile Axle Options: Available in 2, 3, or 4 axle configurations with load capacities up to 48T.

Global Quality Certification: Certified to ISO 9001 and TS 16949 standards for reliable global performance.

Wide Mounting Height Range: Unloaded height 110-350mm; loaded height 370-642mm for diverse trailer types.

OEM/ODM Customization Service: Supports full customization from samples, designs, or minor adjustments.

1-Year Standard Warranty: Comprehensive 1-year warranty on full suspension with optional 2-year extension.

Suitable for Rugged Conditions: Ideal for heavy-duty transport in Africa, Central Asia, and Southeast Asia.

Company profile

Importers and ExportersPatents AwardedQuality AssuranceProduct Certification

Shandong Weierqi Vehicle Parts Co.,Ltd

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤5.31h

AI-Powered supplier vetting

SummaryWelch is a professional towing-device and trailer-accessory supplier with casting, machining, manufacturing, sales, and export capabilities. It offers a broad product range, including traction devices, pintle hooks, turntables, king pins, fifth wheels, landing gear, trailer couplings, and drawbar eyes. The supplier reports ISO9001:2015 certification, documented warehouse and finished-product inspection procedures, three quality-control staff, two test-equipment units, and two R&D engineers. It provides 3D software design and multiple forms of customization, supported by CNC, drilling, boring, induction-heating, milling, painting, and shot-blasting facilities. R&D engineers provide technical support during production and after-sales service. The supplier reports domestic mainstream OEM and upfitter supply and exports to several regions, but no Fortune 500 cooperation. Financial information is present only as year labels, so financial credibility cannot be assessed.

Supplier typeThe supplier identifies itself as a professional technical supplier and conducts casting, manufacturing, sales, and export of towing devices and trailer accessories. Its listed product portfolio covers major towing-system components, indicating a specialized manufacturer rather than a general trading supplier.

CertificationsThe supplier reports an ISO9001:2015 management-system certificate. However, product compliance certification is recorded only as “Others,” without naming a specific product standard or certificate.

After-Sales capabilityThe two technology engineers are responsible for technical support during production and after-sales service, and the supplier provides technical support tied to customer requirements. This explicitly supports after-sales technical assistance, although the breadth and response performance of the service are not stated.

R&D capabilityWelch reports multiple utility model patents, national automotive standard-drafting membership, two R&D engineers, and new-product-development responsibilities. It also provides 3D software design services, but reports no available SDK; the evidence still supports product-development and technical innovation capability.

Production capacityThe supplier operates or reports access to casting and a range of production facilities, including CNC lathes, machining centers, vertical lathes, drilling, boring, induction heating, gantry milling, painting, and shot blasting. Written warehouse and finished-product inspection procedures are reportedly followed, with three quality-control staff and two test-equipment units.

Customization capabilityWelch explicitly supports OEM/ODM customization and machining according to drawings. It offers customization from samples, designs, full customization, minor customization, and flexible customization, together with 3D software design services.

Client casesThe supplier states that its products supply mainstream domestic OEMs and upfitters and are exported to Africa, Southeast Asia, South America, the Middle East, and other global markets. It reports no cooperation with Fortune 500 companies, so the customer evidence demonstrates market reach but not top-tier multinational customer reference strength.