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The Section 232 Truck Parts Tariff: What a 25% Duty on Imported Tires Means for Fleets

A U.S. tariff on medium/heavy-duty truck parts — tires explicitly included — has been in effect since November 2025. Here's exactly what's taxed, what's exempt, and how it factors into the retread decision.

Published September 17, 2026 · Good Hope Retreaders

On November 1, 2025, a new U.S. tariff regime took effect on medium- and heavy-duty trucks, buses, and truck parts — and tires are explicitly named among the parts covered. It's now been in effect for the better part of a year, and it's a live, ongoing input into replacement-tire cost for any U.S. fleet. This isn't the same story as Canada's CBSA dumping investigation into Chinese truck tires, which is a separate case under Canadian trade law — this is a U.S. federal tariff action, already in force, with its own rules on rates, exemptions, and what's still unsettled.

Here's what it actually says, sourced from the trade-compliance and tax advisories tracking it, without the political framing.

What Section 232 actually did

Section 232 of the Trade Expansion Act of 1962 lets the President impose import tariffs on national-security grounds, following a Commerce Department investigation. Using that authority, a presidential proclamation imposed a 25% tariff on imports of medium- and heavy-duty trucks (Classes III–VIII) and truck parts, and a separate 10% tariff on imported buses. The tariffs apply to goods entered for consumption, or withdrawn from a warehouse for consumption, on or after 12:01 a.m. EDT, November 1, 2025.

Tires are named, not implied

The 25% truck-parts tariff isn't limited to engines and drivetrain components. Tax and trade advisories tracking the proclamation are consistent that the covered parts list explicitly names tires, alongside engines, transmissions, and chassis. For a fleet buying new replacement tires imported from outside North America, that's a direct, line-item cost increase layered on top of whatever the tire itself costs.

The USMCA wrinkle — narrower than it sounds

For trucks and parts that qualify under USMCA rules of origin, the tariff is only supposed to apply to the value of the non-U.S. content — not the full value of the part. In practice, though, USMCA-eligible goods are currently treated as duty-free under this specific action, because Commerce and CBP haven't yet finalized the process for identifying and taxing just the non-U.S.-content portion of a USMCA-qualifying part. That's a temporary gap, not a permanent exemption — once that process is established, USMCA-qualifying parts with non-U.S. content could see a tariff applied where none exists today. Tires and parts sourced from outside North America don't get this treatment at all; the full 25% applies now.

Who the offset program actually helps

A companion Import Adjustment Offset Program lets manufacturers that assemble medium- and heavy-duty vehicles or engines in the U.S. claim an offset worth 3.75% of the aggregate value of the vehicles they assemble domestically, running from November 1, 2025 through October 31, 2030. That's relief aimed at U.S. truck and engine assemblers — it doesn't reduce the tariff a fleet or an aftermarket distributor pays on an imported replacement tire.

It isn't finished settling

The Commerce Department is also standing up a recurring process, starting in 2026, that can add further automotive and truck parts to the Section 232 list over time — and trade-compliance sourcing flags that parts added through that process have historically been difficult to remove later. For aftermarket tire distributors and fleets, the practical read is that this tariff exposure is more likely to broaden than to quietly go away.

How this sharpens the retread math

This doesn't change the underlying economics that already make retreading a sound decision — our cost-per-mile breakdown covers that case on its own terms, tariff or no tariff. What it does add is a second, compounding reason the gap between a new tire and a retread is wider for a lot of U.S. fleets right now than it was before November 2025: retreading works from the casing you already own, so a retread cure isn't a new cross-border import transaction and isn't exposed to this specific tariff. A new replacement tire imported from outside North America, on the other hand, is — directly, at the point of entry.

That's a genuine, additive point in retreading's favor — not the whole story, and not a reason to skip the fundamentals. If your volume is high enough to justify it, running your own line means that exposure stays structurally lower regardless of where any given tire in your fleet was built. Our guides on casing ownership and fleet retreading ROI go through that case in more depth, on their own real numbers — not on a forecast of where tariffs go next.

Build pricing resilience into your tire strategy

Whatever tariffs do next, our job stays the same: supply the machinery, consumables, components, and repair tools a fleet or independent shop needs to run its own retreading operation, with transparent all-in Canadian pricing and delivery from our Ontario warehouse.

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