What tyre size does a Cadillac ATS use?

The most common size is 225/40R18. Depending on generation and engine, the Cadillac ATS uses 6 different sizes including 225/40R18, 225/45R17, 225/45R18, 255/35R18, 235/40R18.

Where do I find my exact Cadillac ATS tyre size?

Check the tyre placard in the driver's door jamb or fuel flap, or use the lookup tool on this page to select your generation and engine.

Tyres › Cadillac › ATS

Cadillac ATS tyre sizes

All factory fitments by generation and engine — 6 sizes across 2 generations.

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Quick answer

The most common tyre size on the Cadillac ATS is 225/40R18 (overall diameter ≈ 637 mm). Exact fitment depends on generation and engine — full breakdown below.

ATS (GMT166) 2015 - Coupé (2015–present)

Engine	Tyre sizes
ATS 2.0 Turbo - 276 PS - Benzin - 1998 Hubraum	225/40R18 225/45R17 225/45R18 255/35R18
ATS-V 3.6 - 470 PS - Benzin - 3564 Hubraum	225/40R18 235/40R18 255/35R18 275/35R18

ATS (GMT166, A1SL) 2012 - Limousine (2012–present)

Engine	Tyre sizes
ATS 2.0 Turbo - 276 PS - Benzin - 1998 Hubraum	225/40R18 225/45R17 255/35R18
ATS-V 3.6 - 470 PS - Benzin - 3564 Hubraum	225/40R18 235/40R18 255/35R18 275/35R18

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