2015 Buick GL8 tire and wheel sizes, bolt pattern and tire pressure

Bolt patterns 5x120 or 5x115, depending on the market version.

Tires for the 2015 Buick GL8

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

225/60R16 Best-rated standard on 1 trim · optional on 1

Check price on Amazon · 225/60R16
215/70R15 Best-rated standard on 1 trim

Check price on Amazon · 215/70R15
215/65R16 Best-rated standard on 1 trim

Check price on Amazon · 215/65R16

Also listed: 225/65R17 225/55R17 225/60R17 225/55R18

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Trims sold in 2015: 4
Generations: II I
Other years: 2011
2012
2013
2014
2015
2016
2017
2018
All years (2005–2026)

4 trims sold in 2015

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

Buick GL8 II

2011–2016 2 trims

GL8 2.4i 184 hp · 2.4L I4 215/65R16 98H 2 fitments

Generation: II · 2011–2016
Power: 184 hp
Engine: 2.4L I4, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 215/65R16 Wheels 16x6.5 ET38 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
215/65R16 98H	Rim 16x6.5 ET38 ~~5x120~~	–
225/60R17 99V	Rim 17x7 ET41 ~~5x120~~	–

How to read 98H: 98 is the load index (up to 1,653 lb / 750 kg per tire) and H the speed rating (up to 130 mph / 210 km/h). ET38 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

GL8 3.0i 255 hp · 3.0L V6 225/65R17 99V 2 fitments

Generation: II · 2011–2016
Power: 255 hp
Engine: 3.0L V6, Petrol
Center bore: 66.9 mm
Bolt pattern: 5x120
Thread: M14 x 1.5

Check price on Amazon · 225/65R17 Wheels 17x7 ET41 · 5x120 · 66.9 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
225/65R17 99V	Rim 17x7 ET41 ~~5x120~~	–
225/55R18 98V	Rim 18x7 ET40 ~~5x120~~	–

How to read 99V: 99 is the load index (up to 1,709 lb / 775 kg per tire) and V the speed rating (up to 149 mph / 240 km/h). ET41 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

Buick GL8 I

2005–2017 2 trims

GL8 2.4i 184 hp · 2.5L I4 215/70R15 98T 2 fitments

Generation: Facelift · 2005–2017
Power: 184 hp
Engine: 2.5L I4, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

Check price on Amazon · 215/70R15 Wheels 15x6 ET52 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
215/70R15 98T	Rim 15x6 ET52 ~~5x115~~	–
225/60R16 98H	Rim 16x6.5 ET51 ~~5x115~~	–

How to read 98T: 98 is the load index (up to 1,653 lb / 750 kg per tire) and T the speed rating (up to 118 mph / 190 km/h). ET52 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres.

GL8 3.0i 255 hp · 3.0L V6 225/60R16 98H 2 fitments

Generation: Facelift · 2005–2017
Power: 255 hp
Engine: 3.0L V6, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

Check price on Amazon · 225/60R16 Wheels 16x6.5 ET51 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
225/60R16 98H	Rim 16x6.5 ET51 ~~5x115~~	–
225/55R17 97V	Rim 17x7 ET50 ~~5x115~~	–

How to read 98H: 98 is the load index (up to 1,653 lb / 750 kg per tire) and H the speed rating (up to 130 mph / 210 km/h). ET51 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.