About Sigma Trailer Parts
Sigma Trailer Parts is a specialised manufacturer and exporter of semi-trailer components, headquartered in Liangshan — China's largest trailer production hub. 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 in Liangshan County, Shandong Province — the heart of China's trailer manufacturing industry — Sigma Trailer Parts started with a clear mission: deliver factory-quality trailer components directly to international buyers, eliminating unnecessary middlemen. Today, our 15,000 m² facility houses modern production lines, a dedicated quality lab, and a logistics centre that handles 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
ISO 9001 certified. Every batch undergoes dimensional, hardness, and load testing before shipment.
Export Expertise
Mixed container loading, FOB/CIF terms, and documentation handled — we ship to 40+ countries.
Markets We Serve
Inside Our Factory
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.