Importers of HS 4011.20 (radial) from Korea, South actually paid 21.98% on the taxed portion of the value in 2026-06 — 21.28% 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 4% → 21.98%, with the largest single step +8.3pp in 2025-04. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 4% — importers actually paid 21.98%, so the trade-war overlay added 18 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "4011.20", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 4011.20. The schedule base rate is 4%; importers from South Korea actually paid 21.98% on the dutiable value in 2026-06 — the trade-war overlay added 18 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 4% (2023-07) → 21.98% (2026-06), largest single step +8.3pp in 2025-04.
Korea, South's lower duty (21.28% vs 53.7%) lets it price up to 26.7% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Korea, South actually lands cheaper — $4.4/kg vs $4.5/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · 2 CBP rulings cite this code · reproduce: tariff_story(hs: "4011.20", origin: "South Korea") via /connect. Not customs or legal advice.