2025 Cadillac Optiq-V tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 6x120 on every 2025 trim.

Tires for the 2025 Cadillac Optiq-V

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.

2025–2027 USA 1 trim

Optiq-V Dual Motor (SUV, 5d) 519 hp · Electric · Electric 275/40R21 2 fitments

Check price on Amazon · 275/40R21 Wheels 21x9 ET57 · 6x120 · 66.9 mm on Amazon

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