2021 Buick Regal GS tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x115 on every 2021 trim.

Tires for the 2021 Buick Regal GS

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

245/45R18 Best-rated standard on 1 trim

Check price on Amazon · 245/45R18
245/40R19 Best-rated optional on 1 trim

Check price on Amazon · 245/40R19
245/35R20 Best-rated optional on 1 trim

Check price on Amazon · 245/35R20

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Trims sold in 2021: 1
Generation: II
Other years: 2016
2017
2018
2019
2020
2021
2022
2023
All years (2012–2023)

1 trim sold in 2021

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

Buick Regal GS II

2017–2023 1 trim

Regal GS 2.0T 233 hp · 2.0L LSY I4 245/45R18 96W 3 fitments

Generation: II · 2017–2023
Power: 233 hp
Engine: 2.0L LSY I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

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

Tire size	Rim size and bolt pattern	Pressure, psi
245/45R18 96W	Rim 18x8 ET49 ~~5x115~~	35 psi
245/40R19 98W	Rim 19x8.5 ET49 ~~5x115~~	33 psi
245/35R20 95W	Rim 20x8.5 ET45 ~~5x115~~	36 psi

How to read 96W: 96 is the load index (up to 1,565 lb / 710 kg per tire) and W the speed rating (up to 168 mph / 270 km/h). ET49 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

What these columns mean

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.