U.S. imports of Road Tractors for Semi-Trailers (SITC 78320) totaled $765.8M in August 2026, imported from 8 countries.
Importers of Road Tractors for Semi-Trailers paid $128.2M in duties in August 2026, an average duty rate of 16.75% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Road Tractors for Semi-Trailers imports of $765.8M in August 2026 ran 52% above the year-to-date monthly average of $505.3M.
Last updated: August 2026 dataRoad tractors — the powered units designed exclusively to haul semi-trailers — are a foundational element of long-haul freight infrastructure and a widely traded commodity in North American supply chains. These vehicles are subject to Section 232 tariff measures when imported from certain origins, and NHTSA Federal Motor Vehicle Safety Standards apply at entry. The US market draws heavily from North American manufacturing, though global sourcing patterns shift with fleet-renewal cycles and fuel-technology transitions toward natural gas and electric drivetrains.
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9.7K import shipments a month
Imported road tractors must conform to NHTSA Federal Motor Vehicle Safety Standards (FMVSS) applicable to heavy trucks. The importer must file a HS-7 declaration at entry confirming conformity. Vehicles not meeting FMVSS must be brought into compliance within a specified period or exported; non-conforming tractors cannot be sold or operated on US roads.
At the SITC level, road tractors for semi-trailers are grouped regardless of fuel type, but at the HTS 10-digit level, engine type (diesel, spark-ignition, electric) can determine the specific subheading and applicable duty rate. As natural gas and battery-electric Class 8 tractors enter the market, importers should verify the correct HTS line for each powertrain variant to avoid misclassification.
Basic heading 33 of 642 in section 7
Basic heading 78320 · $765.8M of $172.0B
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Imports · August 2026
origin
Mexico and Canada together supply 100% of it.
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
$765.8MYoY · free account
Exports
$158.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $5.6B of Road Tractors for Semi-Trailers.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.