Standard International Trade Classification
U.S. imports of Parts of Trailers, Semi-Trailers, and Non-Mechanically Propelled Vehicles (SITC 78689) totaled $120.7M in August 2026, imported from 56 countries.
Importers of Parts of Trailers, Semi-Trailers, and Non-Mechanically Propelled Vehicles paid $37.1M in duties in August 2026, an average duty rate of 30.73% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Parts of Trailers, Semi-Trailers, and Non-Mechanically Propelled Vehicles imports of $120.7M in August 2026 ran 10% above the year-to-date monthly average of $109.4M.
Last updated: August 2026 dataReplacement and original-equipment parts for camping trailers, semi-trailers used in goods transport, and other non-self-propelled vehicles are grouped under this heading, making correct component-level classification critical for importers supplying the RV, trucking, and specialty trailer aftermarkets. The breadth of the heading — spanning housing/camping trailers through freight semi-trailers — means that part identity (axle assemblies, hitches, landing gear, body panels) must be matched against the parent vehicle type to avoid misclassification. Duty exposure can vary meaningfully depending on whether a part is destined for a camping trailer versus a commercial freight semi-trailer.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
6.5K import shipments a month
When a component is genuinely interchangeable between vehicle types, classification typically follows the principal use or the importer's documented commercial intent. A licensed customs broker can apply the General Rules of Interpretation and relevant CBP rulings to determine the correct heading, since the duty rates and any trade-remedy exposure may differ between trailer categories.
Axles, hitches, and similar structural components for trailers and semi-trailers generally fall within this heading when they are dedicated parts of those vehicles. However, generic axle or suspension components that serve multiple vehicle types may be pulled into broader parts headings. Binding ruling requests to CBP are advisable for high-volume shipments where the classification is ambiguous.
Basic heading 140 of 642 in section 7
Basic heading 78689 · $120.7M of $172.0B
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Imports · August 2026
origin
China and Canada together supply 46% of it. China pays 48.6% duty; Mexico 15.1%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$120.7MYoY · free account
Exports
$103.4MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.2B of Parts of Trailers, Semi-Trailers, and Non-Mechanically Propelled Vehicles.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.