2015 Buick Regal tire and wheel sizes, bolt pattern and tire pressure

Bolt patterns 5x115 (China) or 5x120 (USA), depending on the market version.

Tires for the 2015 Buick Regal

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

225/55R17 Best-rated standard on 2 trims · China

Check price on Amazon · 225/55R17
235/50R18 Best-rated standard on 1 trim · optional on 1 · USA

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

Check price on Amazon · 245/45R18

Also listed: 245/50R17 245/40R19 255/35R20

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Trims sold in 2015: 5
Generation: V sold in 2 market versions
Other years: 2011
2012
2013
2014
2015
2016
2017
2018
All years (1987–2026)

5 trims sold in 2015

Sold in 2 market versions with different tire sizes and bolt patterns. Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

Buick Regal V

2014–2017 5 trims

China

3 trims

Regal 1.6T +1 variant 181 hp · I4 225/55R17 1 fitment

Same tires and wheels on: 2.0i

Generation: Facelift · 2014–2017
Market: China
Power: 181 hp
Engine: I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M14 x 1.5

Check price on Amazon · 225/55R17 Wheels 17x7 ET42 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
225/55R17	Rim 17x7 ET42 ~~5x115~~	–

Regal 2.0T 251 hp · I4 245/45R18 1 fitment

Generation: Facelift · 2014–2017
Market: China
Power: 251 hp
Engine: I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M14 x 1.5

Check price on Amazon · 245/45R18 Wheels 18x8 ET42 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
245/45R18	Rim 18x8 ET42 ~~5x115~~	–

USA

2 trims

Regal 2.0T 259 hp · 2.0L I4 235/50R18 97V 3 fitments

Generation: Facelift · 2014–2017
Market: USA
Power: 259 hp
Engine: 2.0L I4, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 235/50R18 Wheels 18x8 ET42 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
235/50R18 97V	Rim 18x8 ET42 ~~5x120~~	33 psi
245/40R19 94W	Rim 19x8.5 ET45 ~~5x120~~	35 psi
255/35R20 97Y	Rim 20x8.5 ET41 ~~5x120~~	38 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.

Regal 2.4i 182 hp · 2.4L I4 245/50R17 99H 4 fitments

Generation: Facelift · 2014–2017
Market: USA
Power: 182 hp
Engine: 2.4L I4, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 245/50R17 Wheels 17x7 ET42 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
245/50R17 99H	Rim 17x7 ET42 ~~5x120~~	35 psi
235/50R18 97V	Rim 18x8 ET42 ~~5x120~~	33 psi
245/45R18 96W	Rim 18x8 ET42 ~~5x120~~	35 psi
245/40R19 94W	Rim 19x8.5 ET40 ~~5x120~~	35 psi

How to read 99H: 99 is the load index (up to 1,709 lb / 775 kg per tire) and H the speed rating (up to 130 mph / 210 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.