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CarCareTruth

Cars that use 235/40R18 tires

5 verified vehicle generations are confirmed to run 235/40R18 as an optional or plus size — none we've verified come with it from the factory. The sticker inside your driver's door is always the final word on your car's size.

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Verified to fit as an optional or plus size

On these cars 235/40R18 was a factory option on certain trims or wheels — not the base size. Confirm your trim and wheels against the door-jamb placard.

Best 235/40R18 tires

Ranked by CarCareTruth's independent CCT score among tires that come in 235/40R18 — never by what pays us.

235/40R18 questions

Does any car come with 235/40R18 from the factory?
Not in what we've verified. 5 vehicles run 235/40R18 as an optional or plus size, but none we've confirmed shipped it as the factory (OE) size. Check your door-jamb placard for your car's factory size.
Can I run 235/40R18 if it's listed as optional on my car?
On the cars listed under optional here (2005-2008 Audi A4, 2016-2021 Honda Civic, 2020-2026 Cadillac CT4), 235/40R18 was verified as a factory option on certain trims or wheel sizes — not the base size. Whether it fits your specific car depends on your trim and wheels, so confirm against the door-jamb placard before buying.
Are all 235/40R18 tires the same?
They share the same dimensions, but not the same design. We score the tires that fit 235/40R18 on tread quality, ingredient health, and environmental footprint, then rank by that score. We don't lab-test tires or call one model the outright best.