About Sigma Trailer Parts
Sigma Trailer Parts is a specialised supplier and exporter of semi-trailer components, based in Liangshan — China’s largest trailer production base. Since 2015, we have supplied axles, suspension systems, brakes, couplings, landing gear, wheels, and more to fleet operators and trailer builders across 40+ countries.
Our Story
Founded in 2015 and based in Liangshan County, Shandong Province — the heart of China’s semi-trailer industry — Sigma Trailer Parts was built on one advantage: being where the parts are made. Working at the source means specifications are verified in person rather than over email, and buyers deal with one accountable partner from the first quotation through to container loading. Today our yard and warehouse in Quanpu Town carry ready stock across 22+ product lines, and we handle mixed-container shipments to ports worldwide.
What We Offer
Full Product Range
22+ product lines covering every major trailer component — from axles and brakes to lighting and container locks.
OEM & ODM
Custom branding, specifications, and packaging tailored to your market requirements.
Quality Assurance
Every batch undergoes dimensional, hardness, and load testing before shipment, with material and test certificates supplied on request.
Export Expertise
Mixed container loading, FOB/CIF terms, and documentation handled — we ship to 40+ countries.
Markets We Serve
Inside Our Operation
Company & Legal Information
Sigma Trailer Parts is a brand operated by SHANDONG SIGMA NEW MATERIAL CO., LTD (山东西格玛新材料有限公司), a limited liability company established on 14 May 2015 and registered in Jining High-Tech Zone, Shandong Province, China (Unified Social Credit Code: 9137080033423929XT).
Our registered office is in Jining City, and our yard and warehouse are located in Quanpu Town, Liangshan County — China’s largest semi-trailer production base. We supply semi-trailer axles, suspension systems, braking components, couplings, wheels and body parts, and export to customers across West Africa, East Africa, the Middle East, CIS, South America and Southeast Asia.
| Registered company name | SHANDONG SIGMA NEW MATERIAL CO., LTD 山东西格玛新材料有限公司 |
|---|---|
| Unified Social Credit Code | 9137080033423929XT |
| Established | 14 May 2015 |
| Registered Office | Room 01-1807, 18/F, Baifeng Commercial and Trade Center, Guanghe Sub-district, Jining High-Tech Zone, Jining City, Shandong Province 272000, China |
| Yard & Warehouse | West of Jiliang Highway, Quanpu Town, Liangshan County, Jining, Shandong 272614, China |
Tell us the part you need and your destination port — we'll send specs & a quote today.
Reply within 24 hours — or WhatsApp us at +86 199 5331 6215.