1999 Pontiac Firebird 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 Firebird, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x120.65 (5x4.75") |
|---|---|
| Lug Nut / Bolt Size | N 12x1.50 |
| Center Bore (CB) | 70.3 mm |
| Offset (ET) | 45 |
| Torque Specs | 80 ft-lbs (108 Nm) |
1999 Firebird — Year-Specific Fitment Context
The 1999 Pontiac Firebird is in year 8 of 11 using the 5x120.65 pattern (1992–2002). Wheels from any 1992–2002 Pontiac Firebird are cross-compatible with the 1999 model.
Pontiac Firebird Bolt Pattern by Year
The table below shows how the Firebird's wheel specifications have changed over the years. The 1999 model year is highlighted.
Fitment Notes
The 1999 Pontiac Firebird has a bolt pattern of 5x120.65.
Imperial Conversion: This bolt pattern is commonly referred to as 5x4.75" in imperial units. When searching for aftermarket wheels, you may see them listed as 5x4.75".
This means it is a 5 lug pattern with a circle diameter of 120.65mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, Pontiac Firebird appears from 1992 to 2002 (11 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
5x120.65 Pattern Context
This bolt pattern appears on 202 vehicles in our current database and is considered moderately common.
Examples of other vehicles using 5x120.65:
1999 Pontiac Firebird — Frequently Asked Questions
What is the bolt pattern for a 1999 Pontiac Firebird?
The 1999 Pontiac Firebird uses a 5x120.65 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 45mm.
What other years of Pontiac Firebird have the same bolt pattern as the 1999?
The Pontiac Firebird uses the 5x120.65 pattern from 1992 through 2002. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
How do I measure the bolt pattern on my 1999 Pontiac?
The 1999 Firebird uses a 5x120.65 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 is the PCD for a 1999 Pontiac Firebird?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Firebird, the PCD is 5x120.65.
What is the center bore of a 1999 Pontiac Firebird?
The factory center bore (hub bore) for the 1999 Pontiac Firebird is 70.3mm. If your aftermarket wheels have a larger hub bore, you will need hub-centric rings to prevent vibration.
Can I put aftermarket wheels on my 1999 Pontiac Firebird?
Absolutely. Just ensure the aftermarket wheels have a 5x120.65 bolt pattern, an offset near 45mm, and a center bore of at least 70.3mm (using hub rings if larger).
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).
Editorial Fitment Notes
Pontiac Firebird is generally consistent in bolt-pattern records across model years, but offset and hardware should still be validated before purchase.
- Observed production years in our database: 1992-2002 (11 model years).
- Observed bolt-pattern variants: 1 (5x120.65).
- Observed total offset span across years: 0.0 mm.
- Observed center-bore variants: 1 | 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 1999 Pontiac Firebird, please report it via our About page contact so we can verify and update this record.