OEM wheel and tire fitment specs for the 2018 BMW X6, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.
Recorded OEM specifications for the 2018 BMW X6, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Thread-only product links are shopping examples, not verified fits. Seat style is not confirmed here. As an Amazon Associate we earn from qualifying purchases.
Donor vehicles with overlapping OEM specs
These are vehicle-year records whose recorded OEM ranges overlap this 2018 BMW X6. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 46 donor years. Listed 24 eligible overlaps (not all evaluated years are compatible). Showing all listed.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change -2.35 mm, inner change -10.35 mm. This uses aggregated width/offset ranges, not a specific wheel.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change -2.35 mm, inner change -10.35 mm. This uses aggregated width/offset ranges, not a specific wheel.
OEM specs overlapOEM ranges overlap – confirm the specific wheel
Bolt pattern5x120 · Same recorded PCD
Center bore74.1 mm · same recorded hub figure
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change -2.35 mm, inner change -10.35 mm. This uses aggregated width/offset ranges, not a specific wheel.
BMW X6 Years With Compatible Wheels
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2018 BMW X6. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.
Compare
Compare wheel compatibility between two vehicles
Wheels from (donor vehicle)
Selected Car:
Custom wheel size (optional)
Tip: change values here to simulate custom wheels and immediately see the impact in the comparison below.
Custom tire size (optional)
Installed on (your vehicle)
Selected Car:
2018 BMW X6
Compare Rims
Specification
Wheels from
Installed on
Result (Click it)
Bolt Pattern
The total number of bolt holes and the diameter of the circle they form.
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5x120
Center Bore
The hole in the center of the wheel that fits over the vehicle’s hub.
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74.1 mm
Thread Size
The size and spacing of the threads on the bolts or nuts that hold the wheel in place.
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M14 x 1.25
Rim Diameter
The wheel diameter in inches that determines which tire sizes will fit.
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19"
Rim Width
The distance between the inner edges of the wheel is measured in inches.
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9.0"
Wheel Offset
How far the wheel sits inward or outward relative to the hub mounting surface.
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48 mm
Backspacing
Shows how much space the wheel takes up toward the inside of the vehicle.
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-
Wheel Fasteners
The type of hardware used to secure the wheel to the vehicle.
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-
Compare Tires
Specification
Wheels from
Installed on
Result (Click it)
Section Width
The width of the tire from sidewall to sidewall, measured in millimeters.
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-
Aspect Ratio
The height of the tire’s sidewall expressed as a percentage of its width.
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-
Diameter
The wheel diameter for which the tire is designed to fit.
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-
Tire Pressure
The recommended air pressure for safe and efficient driving.
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-
Overall Diameter
The total height of the tire and wheel combined affects clearance and speedometer accuracy.
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-
Wheel Fitment Parts for the 2018 BMW X6
Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.
As an Amazon Associate we earn from qualifying purchases. Product availability and pricing may change.
2018 BMW X6 Wheel Fitment Guide | wheelinterchange.com
Known OEM Fitment For 2018 BMW X6
The values below are the specific OEM details currently available for this model year. They may reflect different factory packages. If a value seems inconsistent or varies by trim, confirm it with the on-page calculator and your BMW VIN or door-jamb tire label.
Bolt pattern (studs x PCD)
5x120
Center bore (mm)
74.1
Thread size
M14 x 1.25
Rim diameter (in)
20
Rim width (in)
10.0
Wheel offset ET (mm)
40
Backspacing (in)
6.57
Tire size noted
255/50R19
Notes:
The presence of a 20x10 ET40 wheel alongside a 255/50R19 tire suggests multiple OEM configurations. Check your exact factory tire size on the driver door label and your original wheel part numbers to verify which package you have.
Backspacing can vary with measurement method and wheel design. Use the calculator to verify inner and outer clearances against your vehicle.
Do not assume other BMW or X6-year fitments will interchange. Always compare with the calculator before buying.
How To Use The Wheel Interchange Calculator
The calculator on this page lets you compare a donor wheel setup to your 2018 BMW X6 and also try custom wheel and tire sizes.
Select Wheels from (donor vehicle). Pick the exact vehicle the wheels came from, or enter specs directly if known.
Select Installed on (your vehicle) and choose 2018 BMW X6.
Enter Custom wheel size to test different rim diameter, width, and offset ET values.
Enter Custom tire size to test section width and aspect ratio. When you change rim diameter, the calculator updates overall tire diameter in the comparison.
Review the outputs:
Inner clearance: how much closer or farther the wheel sits relative to struts and brakes.
Outer poke: how far the wheel may extend toward the fender.
Tire diameter and speedometer change: aim to stay close to your OEM overall diameter.
Compare against your known OEM values above and your door-jamb tire label, then confirm with BMW OEM documentation if anything is unclear.
Fitment Checklist Before You Buy
Bolt pattern must be 5x120. Adapters change geometry and add risk. Avoid mixing patterns.
Center bore must seat on 74.1 mm. If aftermarket wheels have a larger bore, use quality hub-centric rings to 74.1 mm.
Thread size is M14 x 1.25. Use correct-length hardware that provides full thread engagement. If your wheels use conical vs ball seats, match the seat style to the wheel.
Offset and backspacing must clear calipers, knuckles, and struts. Use the calculator to see inner clearance and outer poke changes.
Tire overall diameter should remain close to OEM. Large changes affect speedometer, ABS, DSC, and clearance. Use the calculator to stay within a conservative range near stock diameter.
Load rating: both wheel and tire must meet or exceed the X6’s axle loads. Check wheel manufacturer specs and tire sidewall ratings.
Brake clearance: visually confirm spoke-to-caliper and barrel-to-caliper clearance. Leave a safety margin after test fit.
Fender and liner clearance: at full steering lock and over bumps, verify no rubbing front or rear.
TPMS: ensure sensor compatibility for your 2018 BMW X6 or plan to transfer OEM sensors.
If your vehicle has staggered OEM sizes, treat front and rear fitment separately in the calculator.
Plus Sizing And Common Upgrades
Plus sizing changes rim diameter and often width to enhance appearance or handling. Because OEM packages for the 2018 BMW X6 vary, confirm your baseline tire size from your door label before making changes.
Start from your actual OEM tire size, then use the calculator to find a tire with similar overall diameter when increasing rim size.
Keep overall diameter near stock to reduce speedometer error and maintain drivetrain and ABS behavior.
Monitor inner clearance as width increases. A wider wheel or lower ET pushes the wheel outward and can reduce inner clearance.
Staggered setups are common on performance SUVs. Validate both front and rear independently for offset, width, and tire diameter.
If you tow or carry heavy loads, prioritize higher load-index tires and robust wheel construction over aggressive sizing.
Installation Tips
Safely lift and support the vehicle on jack stands. Use wheel chocks on the opposite axle.
Clean the hub face and center spigot to bare metal. Remove rust and debris so the wheel seats flush. Apply only a very light anti-seize film on the hub face if desired. Do not lubricate wheel bolt threads unless BMW specifies. Follow BMW guidance for fastener condition.
If using hub-centric rings, seat them fully on the wheel or hub per the ring design.
Hand-start all M14 x 1.25 fasteners and snug in a star pattern to center the wheel. Final-torque to the OEM spec from your owner’s manual with the vehicle on the ground.
After test driving, recheck for any rubbing at full lock and over bumps. Re-torque after 50 to 100 miles.
Verify TPMS operation and adjust tire pressures to the door-jamb placard for your load condition.
74.1 mm. Use hub-centric rings if your aftermarket wheel has a larger center bore.
What thread size are the wheel fasteners?
M14 x 1.25. Ensure proper seat type for your wheels and adequate thread engagement.
Why do I see both a 20 inch wheel and a 255/50R19 tire listed?
The 2018 X6 was offered with multiple OEM wheel and tire packages. These values may come from different trims. Check your door-jamb tire label, original wheel size markings, and use the calculator to confirm your exact configuration.
Can I install 5x112 or other patterns with wobble bolts or thin spacers?
Do not attempt to fit mismatched bolt patterns. Use only 5x120 wheels that seat hub-centrically at 74.1 mm. Pattern-changing adapters alter geometry and add risk.
What offset range will fit my 2018 X6?
Offset depends on wheel width, brake package, and whether the setup is staggered. Use the calculator to compare inner clearance and outer poke against your current OEM setup, then verify physically.
Is the 2018 X6 staggered from the factory?
Some trims are staggered, but this varies. Check your door label and existing wheels for front and rear sizes, then evaluate each axle in the calculator.
Will my TPMS work with new wheels?
If your vehicle is equipped with TPMS, ensure sensor compatibility or transfer your OEM sensors. Confirm by VIN or your BMW service information.
Methodology and sources
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:
Bolt pattern / PCD
Center bore direction (donor wheel bore must not be smaller than the hub)
Wheel diameter, width, and offset against known OEM ranges
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
