2011 Buick Regal Wheel Interchange

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.

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.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench: Search on Amazon
• GM TPMS relearn tool: Search on Amazon
• Hub centric rings 66.9 mm ID: Search on Amazon
• 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.