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

Bolt pattern 5x115 on every 2021 trim.

Tires for the 2021 Buick Regal

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

245/45R18 Best-rated standard on 1 trim · optional on 1

Check price on Amazon · 245/45R18
225/55R17 Best-rated standard on 1 trim

Check price on Amazon · 225/55R17
235/45R18 Best-rated optional on 2 trims

Check price on Amazon · 235/45R18

Also listed: 245/40R19 245/35R20

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Trims sold in 2021: 2
Generation: VI
Other years: 2017
2018
2019
2020
2021
2022
2023
2024
All years (1987–2026)

2 trims sold in 2021

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

Buick Regal VI

2020–2023 2 trims

Regal 1.5T 166 hp · 1.5L LFV I4 225/55R17 97V 4 fitments

Generation: Facelift · 2020–2023
Power: 166 hp
Engine: 1.5L LFV I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

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

Tire size	Rim size and bolt pattern	Pressure, psi
225/55R17 97V	Rim 17x7.5 ET45 ~~5x115~~	32 psi
235/45R18 98V	Rim 18x7.5 ET41 ~~5x115~~	33 psi
245/45R18 96W	Rim 18x8.5 ET49 ~~5x115~~	33 psi
245/40R19 98W	Rim 19x8.5 ET49 ~~5x115~~	33 psi

How to read 97V: 97 is the load index (up to 1,609 lb / 730 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET45 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

Regal 2.0T 233 hp · 2.0L LSY I4 245/45R18 96W 4 fitments

Generation: Facelift · 2020–2023
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 18x8.5 ET49 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
245/45R18 96W	Rim 18x8.5 ET49 ~~5x115~~	33 psi
235/45R18 98V	Rim 18x7.5 ET41 ~~5x115~~	33 psi
245/40R19 98W	Rim 19x8.5 ET49 ~~5x115~~	33 psi
245/35R20 95W	Rim 20x8.5 ET49 ~~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.