2026 Buick Regal tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x115 on every 2026 trim.

Tires for the 2026 Buick Regal

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.

2023–2027 China 2 trims

Regal 1.5T (Saloon) 166 hp · 1.5 L Petrol 1.5 L 225/55R17 4 fitments

Check price on Amazon · 225/55R17 Wheels 17x7.5 ET45 · 5x115 · 70.3 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	225/55R17	Rim 17x7.5 ET45 5x115	33 psi
Alt	245/50R17	Rim 17x8 ET45 5x115	33 psi
Alt	245/45R18	Rim 18x8.5 ET49 5x115	33 psi
Alt	245/40R19	Rim 19x8.5 ET49 5x115	33 psi

Regal 2.0T (Saloon) 233 hp · 2.0 L Petrol 2.0 L 245/45R18 4 fitments

Check price on Amazon · 245/45R18 Wheels 18x8.5 ET49 · 5x115 · 70.3 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	245/45R18	Rim 18x8.5 ET49 5x115	33 psi
Alt	225/55R17	Rim 17x7.5 ET45 5x115	33 psi
Alt	245/40R19	Rim 19x8.5 ET49 5x115	33 psi
Alt	245/35R20	Rim 20x8.5 ET45 5x115	35 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.