2017 Buick Regal Wheel Interchange
tl;dr
2017 Buick Regal: bolt pattern 5x120, center bore 66.9 mm, thread M14 x 1.5, nominal OEM wheel 19x8.5 ET45. Tire information varies by trim. Use the on-page calculator to confirm alternate wheel and tire combos before buying. Gotchas: a listed tire rim diameter of 18 may indicate multiple OEM wheel options.
Recommendation
Follow a four‑step lifecycle when selecting and fitting wheels. Verify fitment, choose hardware, test‑fit, and finalize with torque and alignment. Use the on‑page calculator to compare donor wheels and custom sizes. If any OEM value varies by trim, confirm with the dealer or your VIN.
- Verify bolt pattern and thread size: 5x120, M14 x 1.5. These must match or be adapted with appropriate studs/bolts.
- Confirm center bore: 66.9 mm. Use hub‑centric rings if aftermarket wheels have a larger bore.
- Respect offset: OEM ET 45 mm. Keep offset close to avoid handling changes and rubbing.
- Match rim width: OEM 8.5 in. Wider or narrower rims need tire and clearance checks via the calculator.
- Confirm tire fit: OEM tire shown 235/50R18 but OEM rim diameter also listed 19 in. Use the calculator or VIN lookup to resolve this discrepancy.
- Buy correct lug nuts and a calibrated torque wrench for final installation.
Impact
Wheel choices affect handling, speedometer, and brake clearance. A lower offset moves the tire outward. Wider rims change tire profile and clearance. Different overall diameter alters speedometer and ABS calibration. Testing on the vehicle reveals real clearance and steering behavior.
| OEM fitment value | Provided data |
|---|---|
| Bolt pattern | 5x120 |
| Center bore | 66.9 mm |
| Thread size | M14 x 1.5 |
| Rim diameter | 19 in |
| Rim width | 8.5 in |
| Offset (ET) | 45 mm |
| Backspacing | 6.02 in |
| Tire section width | 235 mm |
| Tire aspect ratio | 50% |
| Tire rim diameter (R) | 18 (may vary by trim) |
Use the calculator to model changes and see exact tire diameter and clearance effects before purchase. This resolves the rim/tire diameter mismatch quickly.
Risks
Be aware of common gotchas that cause returns or unsafe conditions.
- Rubbing: Incorrect offset or too-wide rims can contact suspension or bodywork.
- Hub mismatch: Wheels with a larger center bore require hub‑centric rings.
- Lug fitment: Seat profile and thread engagement must match. Verify lug nut type.
- TPMS and ABS: Different wheel/tire diameter can affect sensors and speed readings.
- Load rating: Aftermarket wheels must meet or exceed vehicle load requirements. Check wheel specs.
- Torque and safety: Under‑ or over‑torqued lug nuts risk wheel loss or warped rotors.
If any specification is unknown or differs by trim, confirm with the VIN, dealer parts department, or OEM service manual. The on‑page calculator helps validate size tradeoffs.
Next actions
Follow this compact checklist and next steps.
- Use the on‑page calculator to compare donor wheels and custom sizes now.
- Confirm rim diameter for your VIN. The 18 vs 19 discrepancy needs verification.
- Measure hub bore and test the wheel on the hub before full installation.
- Order hub‑centric rings if bore is larger than 66.9 mm, and correct lug nuts for M14x1.5.
- Buy a quality torque wrench and torque to OEM spec when mounting wheels.
- Post‑install: perform a low‑speed clearance test and then a professional alignment.
Quick tool links: torque wrench and hub‑centric rings help do the job safely.
Find torque wrenches on Amazon
Find hub-centric rings on Amazon
Next steps: run the on‑page calculator, confirm VIN specifics, and schedule fitting. That will resolve unknowns and reduce risk.
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