2009 Buick Lucerne Wheel Interchange

2009 Buick Lucerne Wheel Interchange And Fitment Guide | wheelinterchange.com

Known OEM Fitment For 2009 Buick Lucerne

The specifications below reflect a known factory configuration for the 2009 Buick Lucerne. Trims and option packages may vary. If your vehicle differs, use the on-page calculator and confirm against your owner’s manual or OEM service information before purchasing.

Notes:

• If your current wheel size or offset is different, verify build data and use the calculator to compare against this baseline.
• Do not attempt to fit 5x114.3 wheels on a 5x115 hub. The mismatch is unsafe.

How To Use The Wheel Interchange Calculator

The calculator lets you compare a donor setup to your 2009 Buick Lucerne, and test custom sizes virtually before you buy. It has two main panels: Wheels from donor vehicle and Installed on your vehicle. You can also enter a Custom wheel size and Custom tire size to see how changes affect clearances and speedometer error.

• Start with baseline: Enter the Lucerne’s known OEM values above as the Installed setup.
• Compare a donor wheel: Input the donor vehicle’s wheel size and offset into the Wheels from panel. If the donor specs are unknown, measure the wheel width and offset markings on the rim and enter those.
• Test custom wheel size: Adjust rim diameter, width, and offset in the Custom wheel size fields. The tool will calculate inner clearance to the strut and outer poke at the fender.
• Test custom tire size: Enter section width and aspect ratio. When you change rim diameter, the calculator updates overall tire diameter in the comparison so you can keep it close to stock.
• Review results: Aim to keep overall tire diameter near stock, maintain adequate inner clearance, and avoid excessive outer poke that can cause rubbing.

If the calculator flags rubbing risk or large geometry changes, reconsider the size or adjust offset and tire profile until the projections look safe. Always verify with a physical test fit when possible.

Fitment Checklist Before You Buy

• Bolt pattern: Must be 5x115. Similar patterns like 5x114.3 are not compatible.
• Center bore: Wheel center bore must be 70.3 mm or larger. If larger, use hub centric rings to reduce to 70.3 mm. If smaller, the wheel will not seat.
• Offset and backspacing: Compare the new wheel’s ET to the stock ET 46 mm. Small changes can be workable, but confirm inner clearance to struts and outer clearance to fenders with the calculator.
• Brake and suspension clearance: Check spoke and barrel clearance over calipers, and inner barrel clearance to knuckle and spring perch.
• Tire diameter and width: Keep overall diameter close to stock to protect ride height, gearing, and speedometer accuracy. Verify section width does not contact fenders or liners at full lock and full compression.
• Load index and speed rating: Tires must meet or exceed the OEM load index and speed rating listed on your driver door placard.
• Lug hardware: Use the correct M12 x 1.5 lug nuts in the proper seat style for your wheels and torque to the OEM spec from your owner’s manual.
• TPMS: Plan for sensor transfer or new compatible sensors if your Lucerne is equipped with TPMS. Relearn may be required.

Plus Sizing And Common Upgrades

Many owners consider a modest plus size for appearance and handling. Because trim-level variations exist, there is no single upgrade size that fits every 2009 Lucerne without checks. Use these guidelines:

• Use the calculator to keep overall tire diameter close to stock. A small change helps maintain speedometer accuracy and ride quality.
• Increase wheel width cautiously and adjust offset to preserve inner clearance and avoid excessive outer poke.
• Select tire load and speed ratings that meet or exceed OEM. Touring-oriented tires maintain comfort on a full-size sedan.
• Before mounting tires, test fit a bare wheel on the front and rear hubs to confirm caliper, hub bore, and stud engagement.

If you are unsure whether a particular 18 inch or 19 inch setup will clear, model it in the calculator using your actual suspension and brake measurements, then verify physically.

Installation Tips

• Preparation: Inspect hubs for rust and clean the mating surface. Lightly brush the hub face so the wheel seats flush.
• Hub centric rings: If using wheels with a larger center bore, install 70.3 mm hub-centric rings sized to your wheel’s bore for vibration-free driving.
• Lugs and threads: Ensure M12 x 1.5 threads are clean and dry. Do not lubricate unless the OEM procedure specifies it.
• Mounting: Hand start all lugs, then snug in a star pattern. Lower the vehicle and torque in a star pattern to the OEM torque specification from your owner’s manual.
• Post-install: Re-torque after 50 to 100 miles. Check for rubbing at full steering lock and over bumps.
• TPMS: If transferring sensors, install with new seals where applicable and perform the relearn procedure as specified by Buick service information.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench
• M12 x 1.5 lug nuts
• 70.3 mm hub centric rings
• Tire pressure gauge

FAQs

What is the bolt pattern on the 2009 Buick Lucerne?
It is 5x115.

What center bore do I need?
The Lucerne hub bore is 70.3 mm. Wheels with a larger bore require hub-centric rings to reduce to 70.3 mm. Smaller bores will not fit.

What lug nut thread size does it use?
M12 x 1.5. Use the correct seat type for your wheel design and torque to the value in the owner’s manual.

Is 5x114.3 the same as 5x115?
No. They are not interchangeable. Using 5x114.3 on a 5x115 hub is unsafe and can damage studs or loosen lugs.

What offset should I choose for aftermarket wheels?
The known stock offset is ET 46 mm. Small deviations can work, but you must verify inner and outer clearances with the calculator and a physical test fit.

Will larger wheels affect ride and speedometer?
Yes. Keep overall tire diameter close to stock to minimize speedometer error and preserve ride quality. Use the calculator to compare diameter changes.

Do I need hub-centric rings?
If your aftermarket wheel’s center bore is larger than 70.3 mm, use rings. If it matches 70.3 mm and the wheel is designed for hub-centric fitment, rings are not needed.

What about TPMS compatibility?
Many 2009 vehicles use TPMS. If your Lucerne has TPMS, transfer sensors or install compatible sensors and perform the relearn procedure specified by Buick.

What tire load index should I use?
Use a load index that meets or exceeds the value on your door placard. Do not downgrade load capacity when changing sizes.

How can I confirm if my trim had a different factory size?
Check the driver door placard, owner’s manual, or OEM service information. If it differs from the values above, set the calculator to match your placard and compare any new sizes against that baseline.