2008 Pontiac G8 Tire Size & Pressure
The 2008 Pontiac G8 tire size depends on trim: the GT takes P245/45R18 96V; the Base takes P245/45R18 96V, per the factory service manual.
Factory-Spec Tire Size
Varies by trim
- GT: P245/45R18 96V
- Base: P245/45R18 96V
GT
Tire Specifications
| Position | Tire Size | Pressure | Load Index | Speed Rating |
|---|---|---|---|---|
| All | P245/45R18 96V | Door Placard | — | — |
| All | 245/45R18 96V | Door Placard | — | — |
| All | 245/40R19 94W | Door Placard | — | — |
Base
Tire Specifications
| Position | Tire Size | Pressure | Load Index | Speed Rating |
|---|---|---|---|---|
| All | P245/45R18 96V | Door Placard | — | — |
| All | 245/45R18 96V | Door Placard | — | — |
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2008 Pontiac G8 Factory Service Manual2008 Pontiac G8 Oil Type & CapacityPowered by factory manual data from our partner sites AllOEMManuals.com & WhatTypeOfOil.com.
Frequently Asked Questions
What size tires does a 2008 Pontiac G8 take?
It depends on the trim: GT uses P245/45R18 96V; Base uses P245/45R18 96V.
What is the tire pressure for a 2008 Pontiac G8?
Refer to the tire pressure placard on your vehicle's driver side door jamb for exact cold inflation pressures.
What is the bolt pattern on a 2008 Pontiac G8?
Bolt pattern data is available in the factory service manual.