1998 Oldsmobile Regency Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 1998 Oldsmobile Regency, 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) | 47 |
| Torque Specs | 80 ft-lbs (108 Nm) |
1998 Regency — Year-Specific Fitment Context
The 1998 model year is the final year of the Oldsmobile Regency's 5x115 bolt pattern run (since 1997). Wheels from any 1997–1998 Oldsmobile Regency are cross-compatible with the 1998 model.
Oldsmobile Regency Bolt Pattern by Year
The table below shows how the Regency's wheel specifications have changed over the years. The 1998 model year is highlighted.
| Year | Bolt Pattern | Center Bore | Offset |
|---|---|---|---|
| 1997 | 5x115 | 70.3 | 47 |
| ▸ 1998 | 5x115 | 70.3 | 47 |
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 1998 Oldsmobile Regency
For your 1998 Oldsmobile Regency, the 5x115 bolt pattern and 70.3mm center bore are critical. Aftermarket wheels often have a larger bore, requiring hub-centric rings to prevent vibration and ensure proper load transfer. The 47mm offset is sensitive; deviations beyond ±5mm may cause rubbing or clearance issues. Always use lug nuts with the correct thread pitch (12x1.5) and seat type (conical/60-degree). Avoid ball-seat lug nuts as they can loosen. Verify wheel weight capacity meets OEM specs. Proper installation is vital for safety.
Historical Fitment Data Reference
In our dataset, Oldsmobile Regency appears from 1997 to 1998 (2 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 after 50-100 miles of driving to maintain clamping force.
- ✅ Use hub-centric rings with aftermarket wheels to avoid vibration and stress on studs.
- ✅ Check inner clearance for brake calipers and suspension components when changing offset.
- ⚠️ 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).
Ready to upgrade or perform maintenance?
🛒 Shop Tools & Accessories on AmazonAs an Amazon Associate, I earn from qualifying purchases.
1998 Oldsmobile Regency — Frequently Asked Questions
What is the bolt pattern for a 1998 Oldsmobile Regency?
The 1998 Oldsmobile Regency uses a 5x115 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 47mm.
What other years of Oldsmobile Regency have the same bolt pattern as the 1998?
The Oldsmobile Regency uses the 5x115 pattern from 1997 through 1998. 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 Oldsmobile?
The 1998 Regency uses a 5x115 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.
Why is matching the 70.3mm center bore important for the 1998 Regency?
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.
Do 1998 Oldsmobile Regencys use lug bolts or lug nuts?
The 1998 Regency requires N 12x1.50 hardware. Check your specific trim to ensure you use the correct conical or spherical seating.
Can I use spacers on my 1998 Oldsmobile Regency?
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.
Need more vehicle fitment data?
Access our complete, raw JSON/CSV database of over 11,000+ vehicles for your next app or project.
Get the Full Dataset