2009 Pontiac G8 Wheel & Tire Sizes
Complete fitment guide for the 2009 Pontiac G8: factory tire sizes, compatible wheel diameters, widths and offsets, and the 5x120 bolt pattern — for every trim.
Bolt Pattern
5x120
Centre Bore
66.9 mm
Lug nuts
M14 x 1.5
Torque: 170 Nm
TPMS
315 MHz
Factory (OEM) Tire Sizes for the 2009 Pontiac G8
Front / square fitments
Click any size to shop tires in stock now — free shipping anywhere in Canada, optional installation at our 5 GTA locations.
2009 Pontiac G8 Wheel Fitment by Trim
Compatible wheel diameter, width and offset ranges for each 2009 Pontiac G8 configuration. Trims with different front and rear specs run a staggered setup.
3.6i · Saloon
Staggered3.6L · V6 · Petrol
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 19–22" | 19–22" |
| Wheel width | 8–9" | 9.5–10.5" |
| Wheel offset | 35–48 mm | 35–55 mm |
| Tire width | 235–265 mm | 235–265 mm |
6.0i GT · Saloon
Staggered6.0L · V8 · Petrol
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 19–22" | 19–22" |
| Wheel width | 8–9" | 9.5–10.5" |
| Wheel offset | 35–48 mm | 35–55 mm |
| Tire width | 235–265 mm | 235–265 mm |
6.2i GXP · Saloon
Staggered6.2L · V8 · Petrol
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 19–22" | 19–22" |
| Wheel width | 8–9" | 9.5–10.5" |
| Wheel offset | 35–48 mm | 35–55 mm |
| Tire width | 235–265 mm | 235–265 mm |
2009 Pontiac G8 Fitment FAQ
What is the bolt pattern on a 2009 Pontiac G8?
The 2009 Pontiac G8 uses a 5x120 bolt pattern (5 lug nuts on a 120 mm circle) with a 66.9 mm centre bore.
What size tires fit a 2009 Pontiac G8?
Factory (OEM) tire sizes for the 2009 Pontiac G8 include 245/45R18, 245/40R19, 255/35ZR20. Always confirm against the placard inside the driver's door jamb.
What wheel sizes can I put on a 2009 Pontiac G8?
Depending on trim, the 2009 Pontiac G8 accepts wheels from 19" up to 22" in diameter with the correct width and offset — larger diameters typically require lower-profile tires to keep the overall rolling diameter stock.
What lug nut size does a 2009 Pontiac G8 use?
The 2009 Pontiac G8 uses M14 x 1.5 lug nuts, torqued to 170 Nm.
Fitment data is provided as a guide. Always verify sizes against your vehicle's door-jamb placard or with our fitment experts before ordering.