Pontiac Bonneville GXP 4.6 V8 Northstar 275hp H-platform (2004-2005) Wheel Offset Calculator | Fitment Stance
Compare wheel and tire dimensions for the Pontiac Bonneville GXP 4.6 V8 Northstar 275hp (H-platform (2004-2005)) against the recorded OEM baseline: 8x18 ET44, 235/50R18, 5x115.
Recorded OEM baseline
Verification pending. Recorded values are provisional; confirm the exact vehicle baseline before calculations or purchases.
| Years | H-platform (2004-2005) |
|---|---|
| Market | unspecified |
| Front wheel | 8x18 ET44 |
| Front tire | 235/50R18 |
| Rear wheel / tire | 8x18 ET44; 235/50R18 |
| Bolt pattern | 5x115 |
| Center bore | Not verified |
| Thread size | Not verified |
| Fastener / seat | Not verified |
How to use this record
The calculator compares nominal wheel and tire position with this OEM baseline. It does not calculate fender, suspension, brake, steering, or loaded clearance. Tires with the same printed size can differ by manufacturer. Confirm applicability for the exact year, market, trim, and package, then measure or test-fit before buying.
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