1998 Pontiac Grand Am Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1998 Pontiac Grand Am, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x100 |
|---|---|
| Lug Nut / Bolt Size | N 12x1.50 |
| Center Bore (CB) | 57.1 mm |
| Offset (ET) | 42 |
| Torque Specs | 80 ft-lbs (108 Nm) |
1998 Grand Am — Year-Specific Fitment Context
The 1998 Pontiac Grand Am is in year 7 of 8 using the 5x100 pattern (1992–1999). Wheels from any 1992–1999 Pontiac Grand Am are cross-compatible with the 1998 model. Across its full production run (1992–2005), the Grand Am has also used: 5x115.
Pontiac Grand Am Bolt Pattern by Year
The table below shows how the Grand Am's wheel specifications have changed over the years. The 1998 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1992 | 5x100 | 57.1 | 45 |
| 1993 | 5x100 | 57.1 | 42 |
| 1994 | 5x100 | 57.1 | 42 |
| 1995 | 5x100 | 57.1 | 42 |
| 1996 | 5x100 | 57.1 | 42 |
| 1997 | 5x100 | 57.1 | 42 |
| ▸ 1998 | 5x100 | 57.1 | 42 |
| 1999 | 5x100 | 57.1 | 42 |
| 2000 | 5x115 | 70.3 | 42 |
| 2001 | 5x115 | 70.3 | 42 |
| 2002 | 5x115 | 70.3 | 42 |
| 2003 | 5x115 | 70.3 | 42 |
| 2004 | 5x115 | 70.3 | 42 |
| 2005 | 5x115 | 70.3 | 42 |
Fitment Notes
The 1998 Pontiac Grand Am has a bolt pattern of 5x100.
This means it is a 5 lug pattern with a circle diameter of 100mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, Pontiac Grand Am appears from 1992 to 2005 (14 model years).
Across model years, this model appears with 2 bolt patterns (5x100, 5x115).
- Observed bolt-pattern variants for this model: 2
- Observed center-bore variants for this model: 2
- Observed lug-size variants for this model: 1
- Observed total offset span across years: 3.0 mm
5x100 Pattern Context
This bolt pattern appears on 447 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x100:
1998 Pontiac Grand Am — Frequently Asked Questions
What is the bolt pattern for a 1998 Pontiac Grand Am?
The 1998 Pontiac Grand Am uses a 5x100 bolt pattern (also called lug pattern or PCD). The center bore is 57.1mm and the offset is 42mm.
What other years of Pontiac Grand Am have the same bolt pattern as the 1998?
The Pontiac Grand Am uses the 5x100 pattern from 1992 through 1999. Wheels from any of these model years are dimensionally compatible with the 1998, provided the offset and center bore also match.
How do I measure the bolt pattern on my 1998 Pontiac?
The 1998 Grand Am uses a 5x100 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.
How tight should I torque the lug nuts on a 1998 Pontiac Grand Am?
Refer to your owner's manual for exact specs, but always tighten the N 12x1.50 hardware in a star or crisscross pattern. Re-torque after the first 50 miles of driving.
What does 42mm offset mean for the 1998 Grand Am?
An offset of 42mm means the wheel's mounting surface is 42mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Pontiac.
Do 1998 Pontiac Grand Ams use lug bolts or lug nuts?
The 1998 Grand Am requires N 12x1.50 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Fitment Checklist Before You Buy Wheels
- 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).
- This model has multiple bolt-pattern records across years. Match wheels to exact year/trim before purchase.
Editorial Fitment Notes
Pontiac Grand Am has multiple wheel-fitment records across generations, so matching exact year and trim is important before ordering wheels.
- Observed production years in our database: 1992-2005 (14 model years).
- Observed bolt-pattern variants: 2 (5x100, 5x115).
- Observed total offset span across years: 3.0 mm.
- Observed center-bore variants: 2 | lug-size variants: 1.
Data Quality & Review
Source note: Compiled from manufacturer fitment references, historical wheel data, and internal normalization rules.
Last reviewed: 2026-05-26 | Reviewed by: Bolt Pattern HQ Editorial Team
If you find a discrepancy for 1998 Pontiac Grand Am, please report it via our About page contact so we can verify and update this record.