2026 Cadillac Optiq tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 6x120 on every 2026 trim.

Tires for the 2026 Cadillac Optiq

Sizes most trims come with first. Open your trim below for its exact size.

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Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

2023–2027 USA 2 trims

Optiq Dual Motor (SUV, 5d) +1 variant 440 hp · Electric · Electric 245/50R20 3 fitments

Same tires and wheels on: Single Motor (SUV, 5d)

Check price on Amazon · 245/50R20 Wheels 20x8.5 ET55 · 6x120 · 66.9 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	245/50R20	Rim 20x8.5 ET55 ~~6x120~~	42 psi
Alt	245/55R19	Rim 19x8.5 ET55 ~~6x120~~	39 psi
Alt	275/40R21	Rim 21x9 ET57 ~~6x120~~	45 psi

What these columns mean

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
Rim size: Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD): Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore: Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure: Recommended cold inflation pressure for that axle, in psi.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.