2018 BMW M6 Wheel Interchange
tl;dr
Short summary for busy readers. Your 2018 BMW M6 OEM wheel details are listed below. Use the on-page calculator to test any alternate rim or tire combinations before buying. Confirm any unclear values with the vehicle placard or OEM dealer. Gotchas and next steps are at the end.
Recommendation
As a technician, I recommend confirming every fitment value before purchase. Start with the vehicle placard and inspect an OEM wheel. Then simulate changes using the on-page calculator. If you plan to change rim diameter, width, or offset, run the calculator for clearance and speedometer effects. Consider hub-centric rings and correct lug nuts when needed.
Impact
Below are the known OEM fitment values for the 2018 BMW M6. These are the base facts you should use when testing alternatives. If a value varies by trim, the calculator and OEM sources will show required adjustments.
| Specification | Value |
|---|---|
| Bolt pattern (studs x PCD) | 5x120 |
| Center bore (mm) | 72.6 |
| Thread size | M14 x 1.25 |
| Rim diameter (in) | 20 |
| Rim width (in) | 9.0 |
| Wheel offset (ET, mm) | 32 |
| Backspacing (in) | 5.76 |
| Tire section width (mm) | 265 |
| Tire aspect ratio (%) | 40 |
| Tire rim diameter (R) | 19 |
Note on a possible inconsistency. The OEM rim diameter is 20 inches, but the listed tire rim diameter is 19 inches. That mismatch might indicate a data entry issue or trim variation. Do not assume they match without verification.
Risks
Changing wheels or tires without verification creates several safety risks. Read this checklist and note the gotchas.
- Rubbing: Incorrect offset or width causes tire-to-suspension contact.
- Speedometer error: Different tire diameter changes speed and odometer readings.
- Load and rating: Unknown wheel or tire ratings can overload components.
- TPMS and sensors: Sensor compatibility and programming may be required.
- Thread and lug compatibility: M14 x 1.25 thread is specified for studs.
- Center bore mismatch: Non hub-centric wheels may need rings for centering.
- Warranty and safety: Aftermarket fitment can affect warranty and insurance.
Next actions
Follow this minimal checklist. Each step moves you safely from planning to fitment.
- Verify the door jamb placard for tire and rim sizes.
- Inspect an OEM wheel and measure rim diameter across the bead seat.
- Use the on-page calculator to simulate any custom wheel or tire sizes.
- If values vary by trim, contact a dealer or check the OEM parts catalog.
- Confirm lug thread M14 x 1.25 and order correct lug nuts when needed.
- Buy hub-centric rings if center bore differs from 72.6 mm.
- Obtain the OEM torque spec before final installation and torque properly.
- Test-ride and recheck clearances and lug torque after 50 miles.
Short checklist for purchases. Use these searches if you need tools or rings.
Final note from a technician. Use the on-page calculator right away. It saves time and prevents fitment mistakes. Next steps are clear. Proceed when you have confirmed the values.
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