2008 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 2008 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) |
2008 G8 — Year-Specific Fitment Context
The 2008 model year marks the beginning of the Pontiac G8's 5x120 bolt pattern era, which continued through 2009 (2 consecutive years). Wheels from any 2008–2009 Pontiac G8 are cross-compatible with the 2008 model.
Pontiac G8 Bolt Pattern by Year
The table below shows how the G8's wheel specifications have changed over the years. The 2008 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 2008 Pontiac G8
For your 2008 Pontiac G8, the 5x120 bolt pattern and 66.5mm center bore are critical. Aftermarket wheels often have a larger center bore, requiring hub-centric rings to prevent vibration and ensure proper load distribution. The stock offset is 48mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always use lug nuts with the correct thread pitch (14x1.50) and seat type (cone seat). Ball seat lug nuts are unsafe and can lead to wheel loss. Verify that aftermarket wheels are hub-centric or use rings, and check offset carefully to maintain safety and performance.
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 after 50-100 miles of driving to ensure proper seating.
- ✅ Avoid using universal fit wheels without hub-centric rings; they can cause vibration and stress on studs.
- ✅ When lowering the vehicle, offset may need adjustment to prevent tire-to-fender contact.
- ⚠️ 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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2008 Pontiac G8 — Frequently Asked Questions
What is the bolt pattern for a 2008 Pontiac G8?
The 2008 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 2008?
The Pontiac G8 uses the 5x120 pattern from 2008 through 2009. Wheels from any of these model years are dimensionally compatible with the 2008, provided the offset and center bore also match.
What does 48mm offset mean for the 2008 G8?
An offset of 48mm means the wheel's mounting surface is 48mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Pontiac.
Can I put aftermarket wheels on my 2008 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 center bore of a 2008 Pontiac G8?
The factory center bore (hub bore) for the 2008 Pontiac G8 is 66.5mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
How do I measure the bolt pattern on my 2008 Pontiac?
The 2008 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.
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