Importers of HS 4011.80 (radial) from Vietnam actually paid 13.88% on the taxed portion of the value in 2026-06 — 13.88% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 4%. Over the window the rate on the taxed portion moved 3.95% → 13.88%, with the largest single step +9pp in 2025-05. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4% — importers actually paid 13.88%, so the trade-war overlay added 9.9 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "4011.80", origin: "Vietnam") · see it at trimtabist.com/tariffs
HS 4011.80. The schedule base rate is 4%; importers from Vietnam actually paid 13.88% on the dutiable value in 2026-06 — the trade-war overlay added 9.9 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 3.95% (2023-07) → 13.88% (2026-06), largest single step +9pp in 2025-05.
Vietnam's lower duty (13.88% vs 37.84%) lets it price up to 21% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, China actually lands cheaper — $3.34/kg vs $3.44/kg (duty in, freight out).
All goods from Vietnam · the whole tariff ledger · 2 CBP rulings cite this code · reproduce: tariff_story(hs: "4011.80", origin: "Vietnam") via /connect. Not customs or legal advice.