2026 Buick GL8 PHEV tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 6x120 on every 2026 trim.

Tires for the 2026 Buick GL8 PHEV

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

TireWheelGuide may earn a commission from purchases made through these links.

Open a trim for its tire and rim sizes, bolt pattern and tire pressure.

2024–2027 China 1 trim

GL8 PHEV 1.5T (MPV) 392 hp · 1.5 L Hybrid 1.5 L · Hybrid 225/55R18 2 fitments

Check price on Amazon · 225/55R18 Wheels 18x7 · 6x120 · 66.9 mm on Amazon

Fit	Tire size	Rim size and bolt pattern	Pressure, psi
OE	225/55R18	Rim 18x7 6x120	–
Alt	245/45R19	Rim 19x8 6x120	–

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.