OEM wheel and tire fitment specs for the 2018 BMW M4, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.
Recorded OEM specifications for the 2018 BMW M4, 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 M4. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 95 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)
Recorded OEM bolt pattern, center bore, and width/offset ranges overlap. This is not a guarantee that every wheel from the donor year fits this vehicle.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Recorded OEM bolt pattern, center bore, and width/offset ranges overlap. This is not a guarantee that every wheel from the donor year fits this vehicle.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Recorded OEM bolt pattern, center bore, and width/offset ranges overlap. This is not a guarantee that every wheel from the donor year fits this vehicle.
OEM specs overlapOEM ranges overlap – confirm the specific wheel
Bolt pattern5x120 · Same recorded PCD
Center bore72.6 mm · same recorded hub figure
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change -0.35 mm, inner change -12.35 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 bore72.6 mm · same recorded hub figure
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Approximate position vs the mid OEM package: outer change -0.35 mm, inner change -12.35 mm. This uses aggregated width/offset ranges, not a specific wheel.
Wheel geometryOEM width/offset ranges overlap (not a specific wheel)
Recorded vehicle-side thread for the 2018 BMW M4 is M14x1.25. This donor year is recorded as M12x1.5. That is the vehicle stud/nut thread, not an intrinsic thread stamped on the wheel. Hardware must match this vehicle’s studs and the selected wheel’s seat and engagement. Existing hardware may be reusable if it already matches. Seat style is not in this dataset, so products are not a verified fit.
Recorded vehicle-side thread differs (M12x1.5 on the donor year vs M14x1.25 on the target vehicle). Hardware must match the target vehicle’s studs and the selected wheel’s seat. Existing hardware may be reusable if it already matches. Seat style is not confirmed in this dataset.
Check wheel configurationCheck lug hardware: donor year M14x1.5 vs 2018 BMW M4 M14x1.25
Bolt pattern5x120 · Same recorded PCD
Center bore72.6 mm · same recorded hub figure
Wheel geometryOutside recorded OEM envelope
Recorded vehicle-side thread for the 2018 BMW M4 is M14x1.25. This donor year is recorded as M14x1.5. That is the vehicle stud/nut thread, not an intrinsic thread stamped on the wheel. Hardware must match this vehicle’s studs and the selected wheel’s seat and engagement. Existing hardware may be reusable if it already matches. Seat style is not in this dataset, so products are not a verified fit.
Dataset suggestionWheel spacer ≈ 17.35 mm – not a verified installation requirement.
A spacer of about 17.35 mm is a dataset suggestion only; clearance is not verified. Estimated outer position is about 17.35 mm farther inward than the mid OEM package. Recorded vehicle-side thread differs (M14x1.5 on the donor year vs M14x1.25 on the target vehicle). Hardware must match the target vehicle’s studs and the selected wheel’s seat. Existing hardware may be reusable if it already matches. Seat style is not confirmed in this dataset.
BMW M4 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 M4. 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 M4
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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72.6 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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18"
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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29 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 M4
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 M4 Wheel Fitment Guide
This page summarizes the wheel and tire data available for the 2018 BMW M4. Some OEM specifications vary by package and axle position. If a spec is not listed here or looks inconsistent, verify it on your vehicle and with OEM sources before purchasing or installing wheels or tires. Use the on-page calculator to compare donor wheels to your M4 and to model custom wheel and tire sizes.
Known OEM fitment for 2018 BMW M4
Bolt pattern
5x120
Center bore
72.6 mm
Thread size
M14 x 1.25
Rim diameter
19 in
Rim width
9.0 in
Wheel offset (ET)
29 mm
Backspacing
5.64 in
Tire section width
255 mm
Tire aspect ratio
40
Tire rim diameter
18 in
Notes: OEM wheel and tire sizes on the M4 can be staggered and can vary by package. The values above reflect known data points but may not represent both axles or all trims. The listed rim diameter and tire rim diameter show both 19 inch and 18 inch equipment in the data. Backspacing can be listed differently depending on how the wheel lip is accounted for. Always confirm what is on your specific vehicle before ordering parts.
For reference only, a 255/40R18 tire is approximately 26.0 in overall diameter. Use this as a comparison point in the calculator, not as a guarantee of your factory size.
How to use the Wheel Interchange Calculator
Set Installed on to 2018 BMW M4. Set Wheels from to your donor vehicle or wheel source.
Use Custom wheel size to model diameter, width, and offset. Use Custom tire size to set section width and aspect ratio.
When you change rim diameter, the tool updates tire diameter in the comparison so you can keep overall diameter in a safe range.
Review:
Inner clearance change to strut and suspension.
Outer position change at the fender lip.
Ride height change from tire diameter difference and the resulting speedometer variance.
If your OEM size is not fully known, start with the values above, then adjust to match your door-jamb tire label or current tire sidewall markings.
Fitment guidance and safety checks
Offset and width work together. Lower offset or wider wheels push outward. Higher offset or narrower wheels tuck inward. Model both in the calculator to avoid fender contact or inner interference.
Brake clearance is critical. Visually and physically test for spoke and barrel clearance over calipers. Do not rely on diameter alone.
Tire diameter should stay close to OEM to protect ABS and stability control behavior. Use the calculator to compare overall diameter and speedometer impact.
Staggered setups may be present from the factory. If unknown, verify front and rear sizes individually on the vehicle or with OEM documentation.
Backspacing values can vary by source because some measurements include the wheel lip. When in doubt, measure your wheel directly and use the calculator to cross-check.
TPMS compatibility can vary by wheel and sensor. Reuse compatible sensors or source correct replacements for your model year.
Hardware and installation essentials
Bolt pattern 5x120 must match the wheel exactly. Do not attempt to fit mismatched patterns.
Center bore 72.6 mm. If the aftermarket wheel has a larger bore, use hub-centric rings sized to 72.6 mm at the hub and your wheel’s bore on the outer side. Never use rings to adapt a smaller bore to a larger hub.
Thread size M14 x 1.25. Use the correct seat type specified by the wheel manufacturer and the correct fastener length, especially if spacers are used. If spacers are added, longer wheel bolts must provide sufficient thread engagement. Spacers are not recommended unless you fully validate clearance and hardware requirements.
Tightening torque is not provided here. Confirm in the BMW owner’s manual or service information for your VIN. Re-torque after 50 to 100 miles of driving.
How to confirm your exact OEM sizes
Door-jamb tire label shows factory tire sizes and pressures for your trim.
Check current tire sidewalls for size on each axle and compare to the calculator.
Inspect the back of your wheel for stamped width, diameter, and offset markings. Common formats include 9Jx19 ET29.
Use your VIN with an official BMW parts catalog or dealer to confirm wheel part numbers and specifications for your exact build.
If backspacing is unclear, measure your wheel directly with a straightedge and ruler or caliper, then verify with the calculator.
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.
