2019 Buick LaCrosse Wheel Interchange
tl;dr
2019 Buick LaCrosse factory wheels use 5x120 studs, 67.1 mm bore, and M14 x 1.5 lug threads. OEM wheel size shown is 19 x 8.5 with ET 40 and 5.82 inch backspacing. Tire data on this page lists 235/50 but shows an 18 inch tire rim, which conflicts with the 19 inch wheel. Use the on-page calculator and OEM sources to confirm your trim before buying wheels or tires.
Recommendation
Match critical fitment first: bolt pattern, center bore, and lug thread. Prioritize wheels with 5x120 and a 67.1 mm bore. Stay near ET 40 on offset and around 8.5 inch rim width unless you test variations in the calculator. Confirm the correct rim diameter for your trim before selecting tires.
Impact
Getting the three core specs right avoids vibration and hub damage. Offset and width changes affect fender clearance and scrub radius. Mismatched rim diameter or tire size affects speedometer and ride height. Using the wrong bore can cause hub chatter or stress on lugs.
Risks
- Incorrect rim diameter listed on this page could lead to incompatible tires.
- Assuming ET tolerance beyond a few millimeters can cause rubbing or steering feel changes.
- Using non hub-centric wheels without rings risks vibration.
- Installing incorrect lug nut type or torque risks stud or wheel failure.
Next actions
Follow this checklist in order. Each step takes only minutes.
- Verify your exact trim specs. Check the door jamb sticker, owner manual, or dealer parts department. Confirm rim diameter, width, and recommended tire size. This page contains conflicting wheel/tire diameter data; do not assume one value is correct.
- Use the on-page wheel/tire calculator. Enter custom rim diameter, width, offset, and custom tire section/aspect ratio. Compare visual clearances and overall diameter changes before ordering.
- Confirm lug thread and torque. Thread size is M14 x 1.5 per the page. Look up OEM wheel torque in your manual or dealer bulletin before tightening.
- Measure hub bore and decide hub-centric rings if needed. Use a ring sized to 67.1 mm bore to center aftermarket wheels.
- Select correct lug nuts. Choose the seat type that matches wheel design and the M14 x 1.5 thread. Check length and taper if using extended studs or spacers.
- Test fit one wheel before final purchase when possible. Inspect for rubbing and clearance on suspension and fender lips.
Quick reference table
| Spec | Value (page) | Notes |
|---|---|---|
| Bolt pattern | 5x120 | Critical match |
| Center bore | 67.1 mm | Use hub-centric ring if needed |
| Thread size | M14 x 1.5 | Confirm lug nut seat type |
| Rim diameter | 19 in | Page also lists 18 in tire. Verify trim |
| Rim width | 8.5 in | Typical OEM width |
| Offset (ET) | 40 mm | Stay close unless tested |
| Backspacing | 5.82 in | Consistent with ET 40 |
| Tire (section x aspect) | 235 / 50 | Confirm rim diameter before buying |
Gotchas and final notes
Do not assume all specs are uniform across trims. If any spec is unknown, use the calculator to model changes and call your dealer for exact OEM torque and recommended tire sizes. Fitment mistakes often come from a single unchecked value.
Tools and parts (optional)
Common items to buy for a safe swap. Use these searches to find tools and rings.
Next steps: confirm your trim details, then run the on-page calculator. After that, order wheels and hardware that match bolt pattern, bore, and thread. If you want, I can walk through calculator scenarios with a target rim or tire size.
Wheel interchange calculator
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