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2008 Pontiac Grand Prix 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 Grand Prix.

2008 Pontiac Grand Prix tire sizes

225/55R17225/60R16225/50R18255/45R18265/40R19
Bolt pattern
Other years
20012002200320042005200620072008 All 1978–2008
Fitment tables

3 trims sold in 2008

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

Pontiac Grand Prix W-body III

2004 – 2008 USA market 3 trims

Grand Prix 3.8i GT

201 hp · V6 225/60 R16 97S 2 fitments
GenerationW-body III 2004–2008
Power201 hp
EngineV6, Petrol
Center bore70.3 mm
PCD5x115
ThreadM12 x 1.5
Tire sizeRim size and bolt patternPressure, psiPrices
225/60 R16 97S16x6.5 ET52 5x11533TiresRims
225/55 R17 95H17x7 ET52 5x11535TiresRims

Grand Prix 3.8i GTP

261 hp · V6 225/55 R17 95V 2 fitments
GenerationW-body III 2004–2008
Power261 hp
EngineV6, Petrol
Center bore70.3 mm
PCD5x115
ThreadM12 x 1.5
Tire sizeRim size and bolt patternPressure, psiPrices
225/55 R17 95V17x6.5 ET52 5x11535TiresRims
225/50 ZR18 94W18x7 ET52 5x11535TiresRims

Grand Prix 5.3i GXP

303 hp · V8 255/45 R18 97V 2 fitments
GenerationW-body III 2004–2008
Power303 hp
EngineV8, Petrol
Center bore70.3 mm
PCD5x115
ThreadM12 x 1.5
Tire sizeRim size and bolt patternPressure, psiPrices
255/45 R18 97V18x7 ET55 5x1152.4TiresRims
265/40 ZR19 96W19x7.5 ET55 5x1152.5TiresRims
Reading the table

What these columns mean

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.

Considering a different size?

Run your OE size against the one you want to see diameter change, ground clearance and speedometer error.

Open the size calculator
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