Importers of HS 4011.10 (radial) from Korea, South actually paid 14.96% on the taxed portion of the value in 2026-06 — 12.83% 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% → 14.96%, with the largest single step +18.7pp 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 14.96%, so the trade-war overlay added 11 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "4011.10", origin: "Korea, South") · see it at trimtabist.com/tariffs
HS 4011.10. The schedule base rate is 4%; importers from South Korea actually paid 14.96% on the dutiable value in 2026-06 — the trade-war overlay added 11 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 4% (2023-07) → 14.96% (2026-06), largest single step +18.7pp in 2025-05.
Korea, South's lower duty (12.83% vs 50.64%) lets it price up to 33.5% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Korea, South actually lands cheaper — $4.16/kg vs $4.65/kg (duty in, freight out).
All goods from South Korea · the whole tariff ledger · reproduce: tariff_story(hs: "4011.10", origin: "South Korea") via /connect. Not customs or legal advice.