2012 Buick Regal Wheel Interchange

2012 Buick Regal Wheel Fitment And Interchange Guide | wheelinterchange.com

Known OEM Fitment For 2012 Buick Regal

The values below are confirmed from at least one 2012 Buick Regal configuration. Other trims or option packages may differ. If a value is missing on your vehicle or appears inconsistent, confirm it with the tire and loading label on the driver door jamb, the owner manual, and by using the on-page calculator to compare options before buying.

Notes and cautions:

• The wheel size shown above lists 19x8.5 ET45, while the tire size shown is 235/50R18. This indicates multiple OEM packages existed in 2012. Do not assume your car has the same configuration without checking your door sticker and owner manual.
• If your OEM specs differ, use the calculator on this page to set your exact stock size, then compare candidates accurately.

How To Use The Wheel Interchange Calculator

• Set Installed on to 2012 Buick Regal. This is your vehicle.
• Choose Wheels from for the donor vehicle you want to test. If you do not know the donor, use Custom wheel size and Custom tire size to enter the candidate dimensions directly.
• Adjust Custom wheel size:
  • Rim diameter and rim width are in inches. Offset is in millimeters.
  • As you change rim diameter, also adjust Custom tire size so overall tire diameter stays within an acceptable range.
• Adjust Custom tire size:
  • Section width in mm and aspect ratio in percent determine the tire’s overall diameter with the chosen rim diameter.
  • The calculator automatically updates tire diameter when rim diameter changes, so review the comparison after each change.
• Review the comparison details:
  • Check inner clearance change to suspension and brakes and outer position change relative to fender.
  • Check overall tire diameter difference and the indicated speedometer variance.
• Aim to keep overall tire diameter change small, commonly within about 2 to 3 percent of your verified stock size, then confirm real-world clearance with a physical test fit.

Fitment Checklist Before You Buy

• Bolt pattern 5x120. Do not attempt 5x120.65 or 5x4.75 patterns.
• Center bore 66.9 mm. If the wheel bore is larger, plan to use hub-centric rings sized 66.9 mm to your wheel’s bore. Never use a ring if the wheel bore is smaller than the hub.
• Threads M14 x 1.5. Match hardware seat style to wheel seat style. GM OE wheels often use a specific seat profile; verify before purchase.
• Offset and backspacing. Use the calculator to ensure inner clearance to struts, spring perches, and brake calipers, and to avoid excessive outer poke past the fender.
• Brake clearance. Test fit at least one front wheel. Use clay on the caliper bridge to verify spoke and barrel clearance through full rotation.
• Load rating. Wheel and tire load index must meet or exceed the Regal’s GAWR values on the door jamb label.
• TPMS. 2012 Regal uses TPMS. Confirm sensor compatibility and programming steps for any new wheels or sensors.
• Tires. Keep overall diameter close to stock. Verify that turning lock-to-lock and full compression do not cause rubbing.
• Return policy. Only buy from sellers who accept returns if a test fit fails.

Plus Sizing And Common Upgrades

The safest approach is to confirm your exact stock size from the car, then use the calculator to evaluate changes. The examples below are diameter-similar options to evaluate in the calculator and to test fit on the car. They are not guaranteed fits.

• If your verified stock tire is 235/50R18 (about 27.3 in diameter), diameter-similar 19 inch options to evaluate include 235/45R19 or 245/40R19. Use the calculator to check inner and outer clearance with your chosen wheel width and offset.
• If your verified stock wheel is 19x8.5 ET45, small width changes often need offset adjustments to maintain inner clearance and fender coverage. Use the calculator to see how a 0.5 to 1.0 inch width change affects position.
• Wider tires can improve grip but may contact struts, liners, or fenders if offset is not appropriate. Always test fit.
• Ride and speedometer. Keep overall diameter change within about 2 to 3 percent of stock to maintain ride height and speedometer accuracy.

Installation Tips

• Safety first. Support the vehicle with rated jack stands on solid ground. Chock the wheels that stay on the ground.
• Prepare the hub. Wire-brush rust from the hub face and center pilot. The mounting face must be clean and flat.
• Dry threads. Install lug nuts dry unless the manufacturer explicitly specifies lubricant. Lubricated threads can lead to over-tightening.
• Hub-centric rings. If required, seat the ring fully on the wheel and ensure it is flush before mounting.
• Hand start all lugs to avoid cross-threading. Snug in a star pattern, then torque to the specification in your Buick owner manual for M14 x 1.5 hardware.
• Re-torque after 50 to 100 miles of driving.
• Final clearance check. With the car on the ground, turn steering lock-to-lock and drive slowly over a speed bump while listening for contact.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench
• M14 x 1.5 lug nuts, correct seat style
• TPMS service kit or replacement sensors
• 3 ton jack stands

FAQs

• What is the bolt pattern for the 2012 Buick Regal

  5x120 as listed above.

• What is the center bore for the 2012 Buick Regal

  66.9 mm. If your wheel has a larger bore, use hub-centric rings sized to 66.9 mm inner and your wheel’s bore outer.

• Will 5x120.65 or 5x4.75 wheels fit my Regal

  No. Stick to the exact 5x120 pattern. Off-pattern wheels are unsafe.

• What offset should I use

  At least one trim used ET 45 mm with an 8.5 inch wide wheel. Other trims may vary. Use the calculator to model any change in width or offset and verify inner and outer clearance with a test fit.

• My door sticker shows a different OEM size than listed here. Which is correct

  Follow your door sticker and owner manual. The values above reflect at least one OEM configuration from 2012, and other trims may differ.

• Can I run 19 inch wheels

  Some 2012 Regal trims were equipped with 19 inch wheels. Confirm your brake and suspension clearance with the calculator and a physical test fit, and match bolt pattern, center bore, and thread size.

• Do I need new TPMS sensors

  You can often transfer existing sensors to new wheels if compatible. Otherwise, use compatible sensors and follow programming steps for the 2012 Regal.

• What is the correct lug nut torque

  Refer to the 2012 Buick Regal owner manual or service information for the exact torque spec for M14 x 1.5 hardware. Do not guess. Re-torque after 50 to 100 miles.

• Are spacers safe on this car

  Use only if necessary to correct clearance, and only hub-centric spacers with the correct 5x120 pattern and proper hardware. Verify thread engagement and consult a professional if unsure.

• How close should my new tire diameter be to stock

  Common guidance is within about 2 to 3 percent of your verified stock diameter to maintain speedometer accuracy and ride height. Use the calculator to check before purchase.