OEM wheel and tire fitment specs for the 2011 Buick Regal, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.
Recorded OEM specifications for the 2011 Buick Regal, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Thread-only product links are shopping examples, not verified fits. Seat style is not confirmed here. As an Amazon Associate we earn from qualifying purchases.
Donor vehicles with overlapping OEM specs
These are vehicle-year records whose recorded OEM ranges overlap this 2011 Buick Regal. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 19 donor years. Listed 19 eligible overlaps (not all evaluated years are compatible). Showing all listed.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Dataset suggestionHub-centric rings ≈ 70.3 → 66.9 mm – not a verified installation requirement.
Hub-centric rings of about 70.3 → 66.9 mm mm may be relevant if the wheel bore is larger than the hub; they cannot enlarge a smaller bore. Approximate position vs the mid OEM package: outer change 6.18 mm, inner change 0.17 mm. This uses aggregated width/offset ranges, not a specific wheel.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Recorded vehicle-side thread for the 2011 Buick Regal is M14x1.5. This donor year is recorded as 1/2"-20UNF. That is the vehicle stud/nut thread, not an intrinsic thread stamped on the wheel. Hardware must match this vehicle’s studs and the selected wheel’s seat and engagement. Existing hardware may be reusable if it already matches. Seat style is not in this dataset, so products are not a verified fit.
Dataset suggestionHub-centric rings ≈ 70.3 → 66.9 mm – not a verified installation requirement.
Hub-centric rings of about 70.3 → 66.9 mm mm may be relevant if the wheel bore is larger than the hub; they cannot enlarge a smaller bore. Recorded vehicle-side thread differs (1/2"-20UNF on the donor year vs M14x1.5 on the target vehicle). Hardware must match the target vehicle’s studs and the selected wheel’s seat. Existing hardware may be reusable if it already matches. Seat style is not confirmed in this dataset. Width/offset ranges overlap; confirm diameter and brake clearance for your trim.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change 5.18 mm, inner change 1.17 mm. This uses aggregated width/offset ranges, not a specific wheel.
Check wheel configurationWheel bore may need hub-centric rings; clearance unverified
Bolt pattern5x115 · Same recorded PCD
Center bore70.3 mm donor vs hub 66.9 mm
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Dataset suggestionHub-centric rings ≈ 70.3 → 66.9 mm – not a verified installation requirement.
Hub-centric rings of about 70.3 → 66.9 mm mm may be relevant if the wheel bore is larger than the hub; they cannot enlarge a smaller bore. Approximate position vs the mid OEM package: outer change 5.18 mm, inner change 1.17 mm. This uses aggregated width/offset ranges, not a specific wheel.
Buick Regal Years With Compatible Wheels
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2011 Buick Regal. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.
Compare
Compare wheel compatibility between two vehicles
Wheels from (donor vehicle)
Selected Car:
Custom wheel size (optional)
Tip: change values here to simulate custom wheels and immediately see the impact in the comparison below.
Custom tire size (optional)
Installed on (your vehicle)
Selected Car:
2011 Buick Regal
Compare Rims
Specification
Wheels from
Installed on
Result (Click it)
Bolt Pattern
The total number of bolt holes and the diameter of the circle they form.
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5x115
Center Bore
The hole in the center of the wheel that fits over the vehicle’s hub.
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66.9 mm
Thread Size
The size and spacing of the threads on the bolts or nuts that hold the wheel in place.
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M14 x 1.5
Rim Diameter
The wheel diameter in inches that determines which tire sizes will fit.
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18"
Rim Width
The distance between the inner edges of the wheel is measured in inches.
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8.0"
Wheel Offset
How far the wheel sits inward or outward relative to the hub mounting surface.
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42 mm
Backspacing
Shows how much space the wheel takes up toward the inside of the vehicle.
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-
Wheel Fasteners
The type of hardware used to secure the wheel to the vehicle.
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-
Compare Tires
Specification
Wheels from
Installed on
Result (Click it)
Section Width
The width of the tire from sidewall to sidewall, measured in millimeters.
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Aspect Ratio
The height of the tire’s sidewall expressed as a percentage of its width.
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Diameter
The wheel diameter for which the tire is designed to fit.
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Tire Pressure
The recommended air pressure for safe and efficient driving.
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Overall Diameter
The total height of the tire and wheel combined affects clearance and speedometer accuracy.
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-
Wheel Fitment Parts for the 2011 Buick Regal
Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.
As an Amazon Associate we earn from qualifying purchases. Product availability and pricing may change.
2011 Buick Regal Wheel Fitment and Interchange Guide
Known OEM Fitment For 2011 Buick Regal
The values below are the known factory specifications provided for the 2011 Buick Regal. Some trims may use different wheel and tire sizes. If you see both 18 inch and 19 inch references, that likely reflects multiple factory configurations. Always confirm your exact trim and option package using the on-page calculator, your owner manual, the tire placard on the driver door jamb, or an OEM parts source by VIN.
Bolt pattern
5x120
Center bore
66.9 mm
Thread size
M14 x 1.5
Known OEM rim diameter
19 in
Known OEM rim width
8.5 in
Known OEM offset
ET 45 mm
Known backspacing
6.02 in
Known OEM tire size
235/50R18
Notes:
Wheel and tire sizes can vary by trim and option package. If your door placard lists a different size than above, follow the placard or verified OEM documentation.
If any value differs from what the calculator or OEM sources show for your VIN, use the OEM value.
How To Use The Wheel Interchange Calculator
The calculator on this page lets you compare a potential donor wheel and tire to your 2011 Buick Regal to check clearances and speedometer impact before you buy.
Set Installed on your vehicle to 2011 Buick Regal. Enter your current wheel and tire if known. If not, use your door placard or OEM references.
Under Wheels from donor vehicle, enter the donor car details or type in a Custom wheel size by diameter, width, and offset.
Adjust Custom tire size by section width and aspect ratio. When you change rim diameter, the calculator updates tire diameter in the comparison so you can target a similar overall rolling diameter.
Review inner clearance to strut and knuckle, outer poke to fender, speedometer change, and ride height difference. Aim for minimal change to overall diameter and safe clearances on both sides.
If an aftermarket wheel has a larger center bore than 66.9 mm, plan hub centric rings to 66.9 mm. If offset or spoke design creates brake interference, a properly engineered spacer may be needed, but only with adequate stud engagement and fender clearance.
Fitment Checklist Before You Buy
Bolt pattern match - 5x120 only. Do not attempt to fit 5x114.3 or other patterns.
Center bore - The hub is 66.9 mm. Aftermarket wheels with a larger bore require rings to 66.9 mm. Wheels with a smaller bore will not seat.
Lug hardware - Thread is M14 x 1.5. Verify lug seat style in the owner manual or with the wheel manufacturer and use matching hardware.
Offset and width - Use the calculator to compare inner clearance to the strut and outer poke to the fender at full lock and compression.
Tire overall diameter - Keep close to your stock overall diameter to maintain speedometer accuracy and avoid rubbing. Use the calculator to keep the change as small as practical.
Load index and speed rating - Tire load index must meet or exceed the door placard. Do not downgrade.
Brake clearance - Confirm spoke and barrel clearance over calipers and balance weights. Test fit whenever possible.
Stud engagement - If using spacers, ensure at least the diameter of the stud in full thread engagement, and that the tire does not contact fenders or liners.
TPMS - Plan to transfer sensors or install compatible sensors and perform relearn per Buick service procedure.
OEM confirmation - Cross check with the owner manual, door jamb placard, and OEM parts catalog by VIN.
Plus Sizing And Common Upgrades
Your known OEM references include a 235/50R18 tire and a separate 19x8.5 ET45 wheel specification. That suggests both 18 inch and 19 inch factory configurations may exist. Use the calculator to:
Target a similar overall diameter to your stock setup to limit speedometer change and preserve ABS and stability system behavior.
Evaluate a plus one move from 18 to 19 inch, or adjust width and offset while safeguarding inner and outer clearances.
Keep offset changes modest. Larger width typically needs offset adjustments to keep the tire centered in the wheel well.
Example only - verify with the calculator and OEM sources: If you start from 235/50R18, aim for a 19 inch tire whose overall diameter stays close to your baseline, then check inner and outer clearances at your chosen wheel width and offset before purchasing.
Installation Tips
Test fit every wheel without a tire first when possible. Spin the hub to confirm caliper and knuckle clearance.
Clean the hub face and center pilot with a wire brush. Remove rust and debris so the wheel seats flush.
If using hub centric rings, install rings that reduce the wheel bore precisely to 66.9 mm.
Use new valve stems and service or replace TPMS as needed. Perform the Buick TPMS relearn after installation.
Tighten lugs by hand in a star pattern, lower the vehicle, then torque to the OEM specification in the owner manual. Re-torque after 50 to 100 miles.
Avoid stacking spacers. If a spacer is required for brake or spoke clearance, use a quality hubcentric spacer and ensure proper stud engagement.
After installation, check for rubbing at full steering lock and over bumps. Inspect inner liners and brake hoses.
Schedule an alignment if you changed wheel width or offset, or if tires show uneven wear.
Plastic coated lug nut socket set to protect wheel finish: Search on Amazon
FAQs
What is the bolt pattern for the 2011 Buick Regal
5x120.
What center bore do I need for hub centric fit
66.9 mm. If an aftermarket wheel has a larger bore, use rings to 66.9 mm. A smaller bore will not fit.
What is the lug thread size
M14 x 1.5. Verify lug seat style required by your wheels before buying hardware.
What are the known factory wheel and tire sizes
Known references include a 19x8.5 ET45 wheel and a 235/50R18 tire. Trims may vary. Confirm with your door placard, owner manual, or VIN based OEM data, then use the calculator to compare options.
Can I use a 5x114.3 wheel with wobble bolts or adapters
No. Use only the correct 5x120 bolt pattern for safe fitment. Adapters and wobble hardware introduce risk and can affect hub load and thread engagement.
Do I need hub spacers to fit wider wheels
Only if necessary to clear calipers or suspension. Use the calculator to check inner and outer clearance. If a spacer is used, ensure hubcentric design and proper stud engagement, and recheck fender clearance.
Will changing wheel size affect my speedometer
Yes if overall tire diameter changes. Use the calculator to keep overall diameter close to stock to minimize speedometer error.
What torque should I use on the lug nuts
Follow the torque specification in the owner manual or OEM service information for the 2011 Buick Regal. Re-torque after 50 to 100 miles.
Can I run a staggered setup on a Regal
Staggered widths can affect rotation patterns and system tuning. Verify inner and outer clearance with the calculator, maintain proper load rating, and consult OEM guidance before deviating from square fitment.
Methodology and sources
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:
Bolt pattern / PCD
Center bore direction (donor wheel bore must not be smaller than the hub)
Wheel diameter, width, and offset against known OEM ranges
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
