2008 Pontiac Grand Prix 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 Grand Prix, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x115 |
|---|---|
| Lug Nut / Bolt Size | N 12x1.50 |
| Center Bore (CB) | 70.3 mm |
| Offset (ET) | 52 |
| Torque Specs | 80 ft-lbs (108 Nm) |
2008 Grand Prix — Year-Specific Fitment Context
The 2008 model year is the final year of the Pontiac Grand Prix's 5x115 bolt pattern run (since 1992). Wheels from any 1992–2008 Pontiac Grand Prix are cross-compatible with the 2008 model.
Pontiac Grand Prix Bolt Pattern by Year
The table below shows how the Grand Prix's wheel specifications have changed over the years. The 2008 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1992 | 5x115 | 70.3 | 52 |
| 1993 | 5x115 | 70.3 | 52 |
| 1994 | 5x115 | 70.3 | 52 |
| 1995 | 5x115 | 70.3 | 52 |
| 1996 | 5x115 | 70.3 | 52 |
| 1997 | 5x115 | 70.3 | 52 |
| 1998 | 5x115 | 70.3 | 52 |
| 1999 | 5x115 | 70.3 | 52 |
| 2000 | 5x115 | 70.3 | 52 |
| 2001 | 5x115 | 70.3 | 52 |
| 2002 | 5x115 | 70.3 | 52 |
| 2003 | 5x115 | 70.3 | 52 |
| 2004 | 5x115 | 70.3 | 52 |
| 2005 | 5x115 | 70.3 | 52 |
| 2006 | 5x115 | 70.3 | 52 |
| 2007 | 5x115 | 70.3 | 52 |
| ▸ 2008 | 5x115 | 70.3 | 52 |
5x115 Pattern Context
This bolt pattern appears on 498 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x115:
Expert Buying Guide for 2008 Pontiac Grand Prix
For your 2008 Pontiac Grand Prix, the 5x115 bolt pattern and 70.3mm 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 factory offset is 52mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always verify offset with a test fit. Use lug nuts with the correct thread pitch (12x1.5) and seat type—factory wheels use a conical (60-degree) seat. Never mix seat types; improper lug nuts can loosen or damage the wheel. Re-torque after 50-100 miles of driving.
Historical Fitment Data Reference
In our dataset, Pontiac Grand Prix appears from 1992 to 2008 (17 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 universal fit wheels without hub-centric rings; they can cause vibration and stress on studs.
- ✅ Check for brake caliper clearance when using wheels with offset less than 48mm or greater than 56mm.
- ⚠️ Verify thread pitch before installation; M12x1.25 and M12x1.5 are not interchangeable.
- ⚠️ Torque lugs in a star pattern to 80 ft-lbs (108 Nm), then re-check torque after 50-100 km (30-60 miles).
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2008 Pontiac Grand Prix — Frequently Asked Questions
What is the bolt pattern for a 2008 Pontiac Grand Prix?
The 2008 Pontiac Grand Prix uses a 5x115 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 52mm.
What other years of Pontiac Grand Prix have the same bolt pattern as the 2008?
The Pontiac Grand Prix uses the 5x115 pattern from 1992 through 2008. Wheels from any of these model years are dimensionally compatible with the 2008, provided the offset and center bore also match.
Can I use spacers on my 2008 Pontiac Grand Prix?
Yes, but ensure the wheel spacers match the 5x115 bolt pattern and 70.3mm center bore. Also verify that you have enough thread engagement for your N 12x1.50 hardware.
Why is matching the 70.3mm center bore important for the 2008 Grand Prix?
The 70.3mm center bore ensures the wheel is perfectly centered on the hub. If the wheel is lug-centric instead of hub-centric, you may experience steering wheel vibration at highway speeds.
What is the center bore of a 2008 Pontiac Grand Prix?
The factory center bore (hub bore) for the 2008 Pontiac Grand Prix is 70.3mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
What does 52mm offset mean for the 2008 Grand Prix?
An offset of 52mm means the wheel's mounting surface is 52mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Pontiac.
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