1999 Buick Riviera Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1999 Buick Riviera, 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) | 45 |
| Torque Specs | 80 ft-lbs (108 Nm) |
1999 Riviera — Year-Specific Fitment Context
The 1999 model year is the final year of the Buick Riviera's 5x115 bolt pattern run (since 1992). Wheels from any 1992–1999 Buick Riviera are cross-compatible with the 1999 model.
Buick Riviera Bolt Pattern by Year
The table below shows how the Riviera's wheel specifications have changed over the years. The 1999 model year is highlighted.
Fitment Notes
The 1999 Buick Riviera has a bolt pattern of 5x115.
This means it is a 5 lug pattern with a circle diameter of 115mm. When shopping for aftermarket wheels, ensure the "lug pattern" or "PCD" matches these numbers.
Year-to-Year Fitment Context
In our dataset, Buick Riviera appears from 1992 to 1999 (7 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
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:
1999 Buick Riviera — Frequently Asked Questions
What is the bolt pattern for a 1999 Buick Riviera?
The 1999 Buick Riviera uses a 5x115 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 45mm.
What other years of Buick Riviera have the same bolt pattern as the 1999?
The Buick Riviera uses the 5x115 pattern from 1992 through 1999. Wheels from any of these model years are dimensionally compatible with the 1999, provided the offset and center bore also match.
Can I use spacers on my 1999 Buick Riviera?
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.
What does 45mm offset mean for the 1999 Riviera?
An offset of 45mm means the wheel's mounting surface is 45mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Buick.
How tight should I torque the lug nuts on a 1999 Buick Riviera?
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 is the PCD for a 1999 Buick Riviera?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 1999 Riviera, the PCD is 5x115.
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
Buick Riviera 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: 1992-1999 (7 model years).
- Observed bolt-pattern variants: 1 (5x115).
- 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 Buick Riviera, please report it via our About page contact so we can verify and update this record.