1999 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 1999 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) |
1999 Grand Prix — Year-Specific Fitment Context
The 1999 Pontiac Grand Prix is in year 8 of 17 using the 5x115 pattern (1992–2008). Wheels from any 1992–2008 Pontiac Grand Prix are cross-compatible with the 1999 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 1999 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 1999 Pontiac Grand Prix
When selecting wheels for your 1999 Pontiac Grand Prix, the 5x115 bolt pattern is shared across 1992–2008 models, ensuring broad compatibility. The 70.3mm center bore is critical: aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. Offset is sensitive; the factory 52mm offset maintains suspension geometry and brake clearance. Deviating more than ±5mm may cause rubbing or handling issues. Always verify lug nut thread pitch (12x1.50) and seat type—factory wheels use conical (60-degree) seats. Using incorrect lug nuts can lead to wheel loosening. For safety, re-torque after 50-100 miles and avoid mixing steel and aluminum lug nuts.
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 to ensure proper seating.
- ✅ If using aftermarket wheels, always install hub-centric rings (70.3mm ID to wheel's bore) to prevent vibrations.
- ✅ Avoid spacers or adapters that change offset beyond ±5mm, as they can stress wheel bearings and cause rubbing.
- ⚠️ 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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1999 Pontiac Grand Prix — Frequently Asked Questions
What is the bolt pattern for a 1999 Pontiac Grand Prix?
The 1999 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 1999?
The Pontiac Grand Prix uses the 5x115 pattern from 1992 through 2008. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
Can I put aftermarket wheels on my 1999 Pontiac Grand Prix?
Absolutely. Just ensure the aftermarket wheels have a 5x115 bolt pattern, an offset near 52mm, and a center bore of at least 70.3mm (using hub rings if larger).
What is the factory wheel offset for a 1999 Pontiac Grand Prix?
The OEM offset for the 1999 Grand Prix is typically around 52mm. Depending on wheel width, a deviation of ±5mm is usually acceptable, but verify suspension clearance.
What is the PCD for a 1999 Pontiac Grand Prix?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Grand Prix, the PCD is 5x115.
What is the center bore of a 1999 Pontiac Grand Prix?
The factory center bore (hub bore) for the 1999 Pontiac Grand Prix is 70.3mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
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