Are you looking for the perfect wheel and tire fitment for your 2008-2009 Pontiact G8 GT or GXP? Our Pontiact G8 fitment guide will help you dial in wider wheel and tire sizes for your Holden to increase performance while describing the changes to suspension, alignment, or spacers that your G8 might need. Our fitments offer options to achieve an aggressive stance or performance oriented track setups focused on maximizing tire width and sidewall support. Concave Flow Formed wheels like the ARC-8, EC-7, and SM-10 are popular on modified G8's while our Forged ARC-8RT, ML-10RT, VS-5RS, EC-7RS, and SM-10RS offer the ultimate in chassis-specific performance. If you’re looking unlock performance and improve the look of your Pontiact G8 GT or GXP, Apex Wheels are the natural choice.
Available Wheel Designs
Forged Designs
OEM+ Wheel Fitment
Easy upgrades for street-driven cars
These fitments are ideal for the SS/Commodore/G8 owner who wants a no-nonsense direct bolt-on fitment. These fitments are a step up from stock wheels and tires, and offer a small but noticeable performance improvement.
Staggered Setups
Maintains stock-like handling characteristics, tires can only be rotated left to right. Maximizes both front and rear tire width.
Wheels
- Front Wheel Size: 18x8.5" ET35/40
- Rear Wheel Size: 18x9.5" ET35
- Available in: ARC-8, EC-7, SM-10, ML-10RT, VS-5RS
Tires
- APEX Staff Pick:
- Front Tire Size: 245/45-18
- Rear Tire Size: 265/45-18
- Direct fit
Wheels
- Front Wheel Size: 19x8.5" ET35
- Rear Wheel Size: 19x9.5" ET35
- Available in: ARC-8, EC-7, SM-10, VS-5RS
Tires
- APEX Staff Pick:
- Front Tire Size: 245/40-19
- Rear Tire Size: 265/40-19
- Direct Fit
Performance Street and Track Wheel Fitment
Wider fitments for enhanced performance
These Chevy SS/Holden Commodore/G8 wheel fitments are effective for both performance-oriented street cars and weekend track warriors. The suspension type, alignment settings, and tire brand/size can be changed accordingly to work for either scenario.
Staggered Setups
Maintains stock-like handling characteristics, tires can only be rotated left to right. Maximizes both front and rear tire width.
Wheels
- Front Wheel Size: 18x9" ET30
- Rear Wheel Size: 18x9.5" ET35
- Available in: ARC-8, ARC-8RT, EC-7, EC-7RS, ML-10RT, SM-10, SM-10RS, VS-5RS
- Popular fitment
Tires
- APEX Staff Pick:
- Front Tire Size: 245/45-18
- Rear Tire Size: 275/40-18
- Direct fit
Wheels
- Front Wheel Size: 18x9" ET30
- Rear Wheel Size: 18x10" ET42
- Available in: ARC-8, ARC-8RT, EC-7, ML-10RT, SM-10, VS-5RS
- Popular fitment
Tires
- APEX Staff Pick:
- Front Tire Size: 245/45-18
- Rear Tire Size: 285/40-18
- Typically a direct fit, may need slight camber adjustments depending on ride height
- Wider Alternative:
- Front Tire Size: 255/45-18
- Rear Tire Size: 285/40-18
- Typically a direct fit, may need slight camber adjustments depending on ride height
Square Setups
Recommended for enthusiasts that want to mitigate understeer and rotate tires front & rear for extended life. Square configurations may compromise rear-end grip when compared to staggered configurations.
Wheels
- Front Wheel Size: 18x9.5" ET35
- Rear Wheel Size: 18x9.5" ET35
- Available in: ARC-8, EC-7, SM-10, ARC-8RT, ML-10RT, VS-5RS, EC-7RS
Tires
- APEX Staff Pick:
- Front Tire Size: 265/40-18
- Rear Tire Size: 265/40-18
- Direct fit
Wheels
- Front Wheel Size: 19x9.5" ET35
- Rear Wheel Size: 19x9.5" ET35
- Available in: ARC-8, EC-7, SM-10, ARC-8RT, ML-10RT, VS-5RS
Tires
- APEX Staff Pick:
- Front Tire Size: 265/35-19
- Rear Tire Size: 265/35-19
- Direct fit
Aggressive Street Wheel Fitment
Aggressive fitments focused on appearance
These fitments are ideal for the SS Sedan/Commodore/G8 owner who wants to fill out the wheel wells with perfectly flush offsets. These fitments are sometimes direct bolt-on, but often times require small spacers, negative camber, or rolled fenders for the sake of dialing in the perfect blend of function and form.
Narrower tire sizes relative to wheel width are more common here to help move the tire sidewall away from the fenders with more aggressive offsets. Street-oriented all-season and summer tires are popular options.
Staggered Setups
Maintains stock-like handling characteristics, tires can only be rotated left to right. Maximizes both front and rear tire width.
Wheels
- Front Wheel Size: 18x9.5" ET35
- Rear Wheel Size: 18x10.5" ET40
- Available in: EC-7, VS-5RS
Tires
- APEX Staff Pick:
- Front Tire Size: 265/40-18
- Rear Tire Size: 285/40-18
- Additional negative camber may be needed depending on tire model and ride height
Wheels
- Front Wheel Size: 19x9.5" ET35
- Rear Wheel Size: 19x10.5" ET45
- Available in: EC-7, SM-10, VS-5RS, ML-10RT
Tires
- APEX Staff Pick:
- Front Tire Size: 265/35-19
- Rear Tire Size: 285/35-19
- Additional negative camber may be needed depending on tire model and ride height
Additional Resources
Still have questions?
Fill out our Fitment Recommendation form Call us: 925-245-0773 Email us: support@apexraceparts.com