2009 Pontiac G8 Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2009 Pontiac G8, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x120 |
|---|---|
| Lug Nut / Bolt Size | N 14x1.50 |
| Center Bore (CB) | 66.5 mm |
| Offset (ET) | 48 |
| Torque Specs | 100 ft-lbs (135 Nm) |
2009 G8 — Year-Specific Fitment Context
The 2009 model year is the final year of the Pontiac G8's 5x120 bolt pattern run (since 2008). Wheels from any 2008–2009 Pontiac G8 are cross-compatible with the 2009 model.
Pontiac G8 Bolt Pattern by Year
The table below shows how the G8's wheel specifications have changed over the years. The 2009 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 2008 | 5x120 | 66.5 | 48 |
| ▸ 2009 | 5x120 | 66.5 | 48 |
5x120 Pattern Context
This bolt pattern appears on 633 vehicles in our current database and is considered common.
Examples of other vehicles using 5x120:
Expert Buying Guide for 2009 Pontiac G8
For your 2009 Pontiac G8, the correct bolt pattern is 5x120 with a center bore of 66.5mm. When selecting aftermarket wheels, ensure they have a center bore of at least 66.5mm; if larger, use hub-centric rings to prevent vibrations and ensure proper load distribution. The offset is critical: stock is 48mm, but a range of 35-55mm is acceptable depending on tire width and suspension. Going too low (e.g., 20mm) may cause rubbing; too high (e.g., 60mm) may contact struts. Always use lug nuts with the correct thread pitch (14x1.50) and seat type (cone or ball seat). Never use incorrect lug nuts as they can loosen or damage the wheel. Re-torque after 50-100 miles.
Historical Fitment Data Reference
In our dataset, Pontiac G8 appears from 2008 to 2009 (2 model years). Across recorded model years, this model generally keeps the same bolt pattern.
- Observed bolt-pattern variants for this model: 1
- Observed center-bore variants for this model: 1
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 0.0 mm
Quick Tips & Safety Warnings
- ✅ Re-torque lug nuts to 100 ft-lbs after 50-100 miles of driving.
- ✅ Avoid using wheels with a center bore smaller than 66.5mm; they will not fit.
- ✅ Check for caliper clearance when using wheels with offset below 40mm or above 55mm.
- ⚠️ Confirm bolt pattern carefully. 5x120 is often confused with other common 5-lug patterns.
- ⚠️ Torque lugs in a star pattern to 100 ft-lbs (135 Nm), then re-check torque after 50-100 km (30-60 miles).
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2009 Pontiac G8 — Frequently Asked Questions
What is the bolt pattern for a 2009 Pontiac G8?
The 2009 Pontiac G8 uses a 5x120 bolt pattern (also called lug pattern or PCD). The center bore is 66.5mm and the offset is 48mm.
What other years of Pontiac G8 have the same bolt pattern as the 2009?
The Pontiac G8 uses the 5x120 pattern from 2008 through 2009. Wheels from any of these model years are dimensionally compatible with the 2009, provided the offset and center bore also match.
Can I put aftermarket wheels on my 2009 Pontiac G8?
Absolutely. Just ensure the aftermarket wheels have a 5x120 bolt pattern, an offset near 48mm, and a center bore of at least 66.5mm (using hub rings if larger).
What is the factory wheel offset for a 2009 Pontiac G8?
The OEM offset for the 2009 G8 is typically around 48mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
How do I measure the bolt pattern on my 2009 Pontiac?
The 2009 G8 uses a 5x120 pattern. For 4, 6, or 8-lug wheels, measure center-to-center across opposite holes. For 5-lug, measure from the center of one hole to the back of the opposite hole.
What lug nut size does the 2009 Pontiac G8 use?
The 2009 Pontiac G8 uses N 14x1.50 lug nuts. Always verify the thread pitch and seat type (cone, ball, or flat) match your aftermarket wheels.
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