2008 Pontiac G8 tire and wheel sizes, bolt pattern and tire pressure

Check the tables below for every tire size, wheel size, bolt pattern (PCD), rim offset and tire pressure fitted to the 2008 Pontiac G8.

2008 Pontiac G8 tire sizes

245/45R18 245/40R19

Bolt pattern

Other years

2008 2009 All 2008–2009

Fitment tables

Open a trim for its factory package and every alternative size, front and rear.

2008 – 2009 USA market 2 trims

256 hp · 3.6L LY7 V6 245/45 R18 96V 2 fitments

GenerationI 2008–2009

Power256 hp

Engine3.6L LY7 V6, Petrol

Center bore66.9 mm

PCD5x120

ThreadM14 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
245/45 R18 96V	18x8 ET48 ~~5x120~~	35	Tires Rims
245/40 R19 95W	19x8 ET48 ~~5x120~~	36	Tires Rims

361 hp · 6.0L L76 V8 245/45 R18 96V 2 fitments

GenerationI 2008–2009

Power361 hp

Engine6.0L L76 V8, Petrol

Center bore66.9 mm

PCD5x120

ThreadM14 x 1.5

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
245/45 R18 96V	18x8 ET48 ~~5x120~~	35	Tires Rims
245/40 R19 94W	19x8 ET48 ~~5x120~~	36	Tires Rims

Reading the table

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
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.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.