2020 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 2020 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) |
2020 Regal Sportback — Year-Specific Fitment Context
The 2020 model year is the final year of the Buick Regal Sportback's 5x115 bolt pattern run (since 2018). Wheels from any 2018–2020 Buick Regal Sportback are cross-compatible with the 2020 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 2020 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 2020 Buick Regal Sportback
For your 2020 Buick Regal Sportback, the 5x115 bolt pattern and 70.3mm center bore are critical. Aftermarket wheels often have a larger center bore (e.g., 73.1mm), requiring hub-centric rings to prevent vibration and ensure proper load transfer. The factory offset is 49mm; deviations beyond ±5mm may cause rubbing or clearance issues. Always use lug nuts with the correct 12x1.5 thread pitch and a 60-degree conical seat—ball-seat or shank-style nuts are unsafe. Re-torque after 50-100 miles. Verify wheel weight capacity meets or exceeds OEM specs.
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 100 ft-lbs after 50-100 miles of driving.
- ✅ Avoid wheels with offset below 44mm or above 54mm to prevent rubbing or brake clearance issues.
- ✅ If using aftermarket wheels, ensure hub-centric rings are installed to match the 70.3mm center bore.
- ⚠️ 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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2020 Buick Regal Sportback — Frequently Asked Questions
What is the bolt pattern for a 2020 Buick Regal Sportback?
The 2020 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 2020?
The Buick Regal Sportback uses the 5x115 pattern from 2018 through 2020. Wheels from any of these model years are dimensionally compatible with the 2020, provided the offset and center bore also match.
How do I measure the bolt pattern on my 2020 Buick?
The 2020 Regal Sportback 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.
What is the PCD for a 2020 Buick Regal Sportback?
PCD stands for Pitch Circle Diameter, which is the same as the bolt pattern. For the 2020 Regal Sportback, the PCD is 5x115.
What is the center bore of a 2020 Buick Regal Sportback?
The factory center bore (hub bore) for the 2020 Buick Regal Sportback 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 2020 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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