2018 Buick Regal Sportback Bolt Pattern
Checking fitment for your vehicle? Below you will find the factory bolt pattern (also known as the lug pattern) for the 2018 Buick Regal Sportback, along with offset and center bore data.
| Bolt Pattern (Lug Pattern) | 5x115 |
|---|---|
| Lug Nut / Bolt Size | 12x1.5 |
| Center Bore (CB) | 70.3 mm |
| Offset (ET) | 49 |
| Torque Specs | 80 ft-lbs (108 Nm) |
2018 Regal Sportback — Year-Specific Fitment Context
The 2018 model year marks the beginning of the Buick Regal Sportback's 5x115 bolt pattern era, which continued through 2020 (3 consecutive years). Wheels from any 2018–2020 Buick Regal Sportback are cross-compatible with the 2018 model.
Buick Regal Sportback Bolt Pattern by Year
The table below shows how the Regal Sportback's wheel specifications have changed over the years. The 2018 model year is highlighted.
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 2018 Buick Regal Sportback
For your 2018 Buick Regal Sportback, the bolt pattern is 5x115 with a 70.3mm center bore. When selecting aftermarket wheels, ensure the center bore matches or use hub-centric rings to prevent vibrations. The factory offset is 49mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always verify lug nut thread pitch (12x1.5) and seat type—factory uses conical (60-degree) seats. Using incorrect lug nuts can lead to wheel detachment. Re-torque after 50-100 miles to maintain clamping force.
Historical Fitment Data Reference
In our dataset, Buick Regal Sportback appears from 2018 to 2020 (3 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 140 ft-lbs after 50-100 miles of driving.
- ✅ Avoid wheels with offset below 44mm to prevent inner tire rub on suspension components.
- ✅ If using aftermarket wheels with a larger center bore, install hub-centric rings to ensure proper centering.
- ⚠️ 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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2018 Buick Regal Sportback — Frequently Asked Questions
What is the bolt pattern for a 2018 Buick Regal Sportback?
The 2018 Buick Regal Sportback uses a 5x115 bolt pattern (also called lug pattern or PCD). The center bore is 70.3mm and the offset is 49mm.
What other years of Buick Regal Sportback have the same bolt pattern as the 2018?
The Buick Regal Sportback uses the 5x115 pattern from 2018 through 2020. Wheels from any of these model years are dimensionally compatible with the 2018, provided the offset and center bore also match.
Can I use spacers on my 2018 Buick Regal Sportback?
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 12x1.5 hardware.
Will wheels from another Buick fit my 2018 Regal Sportback?
Only if they share the exact same 5x115 bolt pattern, a compatible offset, and a center bore equal to or larger than 70.3mm.
What does 49mm offset mean for the 2018 Regal Sportback?
An offset of 49mm means the wheel's mounting surface is 49mm away from its centerline. Changing this value drastically can affect suspension geometry and wheel bearing wear on your Buick.
Can I put aftermarket wheels on my 2018 Buick Regal Sportback?
Absolutely. Just ensure the aftermarket wheels have a 5x115 bolt pattern, an offset near 49mm, and a center bore of at least 70.3mm (using hub rings if larger).
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