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

Bolt pattern 5x115 on every 2021 trim.

Tires for the 2021 Buick Regal TourX

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

235/50R18 Best-rated standard on 1 trim

Check price on Amazon · 235/50R18
245/45R18 Best-rated optional on 1 trim

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

Check price on Amazon · 245/40R19

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Trims sold in 2021: 1
Generation: Regal TourX
Other years: 2018
2019
2020
2021
All years (2018–2021)

1 trim sold in 2021

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

Buick Regal TourX Regal TourX

2018–2021 1 trim

Regal TourX 2.0T 250 hp · 2.0L LTG I4 235/50R18 97V 3 fitments

Generation: Regal TourX · 2018–2021
Power: 250 hp
Engine: 2.0L LTG I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

Check price on Amazon · 235/50R18 Wheels 18x8 ET42 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
235/50R18 97V	Rim 18x8 ET42 ~~5x115~~	32 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). ET42 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.