OEM wheel and tire fitment specs for the 2020 Audi A4, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.
Recorded OEM specifications for the 2020 Audi A4, 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.
Center-bore records disagree: year-level hub 66.6 mm vs trim range 66.5–66.5 mm. Interchange below does not treat this as an unqualified match.
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 2020 Audi A4. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 188 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)
Center-bore records disagree (target year-level hub 66.6 mm vs trim range 66.5–66.5 mm). Unqualified overlap is not claimed until the conflict is resolved.
Compare a donor vehicle or custom wheel against this 2020 Audi A4. 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:
2020 Audi A4
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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5x112
Center Bore
The hole in the center of the wheel that fits over the vehicle’s hub.
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66.5 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 1.5
Rim Diameter
The wheel diameter in inches that determines which tire sizes will fit.
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17"
Rim Width
The distance between the inner edges of the wheel is measured in inches.
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7.0"
Wheel Offset
How far the wheel sits inward or outward relative to the hub mounting surface.
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42 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 2020 Audi A4
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.
2020 Audi A4 Wheel Fitment Guide
Goal
You want wheels from another vehicle to fit your 2020 Audi A4 without rubbing, vibration, or warning lights. The challenge is that trim packages vary, so you need a method to validate bolt pattern, center bore, offset, and tire diameter before you buy or install. I will walk you through the checks I use in the shop and how to confirm everything with the on-page calculator on wheelinterchange.com.
Prerequisites
Assumptions and constraints for this year and model:
Trim packages may use different tire and wheel sizes. Use your door-jamb placard or OEM documentation for your exact baseline.
Use hub-centric fitment on Audi for best vibration control. Adapter solutions change offset and add complexity.
Seat type of the fastener must match the wheel. Audi OE typically uses wheel bolts, not studs.
Known OEM fitment for 2020 Audi A4
The following values are available for this model year. Some items may vary by trim. If your car shows different sizes on the door placard, use those values as your baseline, then validate with the calculator.
Parameter
Value
Notes
Bolt pattern
5x112
5 studs, 112 mm PCD
Center bore
66.6 mm
Hub pilot size
Thread size
M14 x 1.5
Wheel bolt thread
Wheel size
18 x 8.0
Known OEM package
Offset (ET)
40 mm
For 18 x 8.0 wheel above
Backspacing
5.57 in
For 18 x 8.0 ET40
Tire size
225/50R17
Known OEM package on certain trims
Note the wheel and tire values above reflect different OEM packages. Your A4 may have 17 inch or 18 inch factory equipment. Confirm your baseline on the door placard, then match it in the calculator.
Tools and references
Owner’s manual and door-jamb placard for OEM size and torque spec
Hub-centric rings for 66.6 mm hub if aftermarket wheel bore is larger: search on Amazon
Digital caliper for measuring wheel bore and thickness: search on Amazon
Step by step
Follow this sequence to evaluate a donor wheel or a custom size for your 2020 Audi A4.
1) Establish your baseline
Read the tire size on your door-jamb placard and your current wheel size if known. The car may have 17 inch tires like 225/50R17 or an 18 x 8.0 ET40 wheel package.
If your exact wheel specs are unknown, use the on-page calculator to start from the known values above, then adjust to match your placard size.
2) Load the on-page calculator
Set “Installed on (your vehicle)” to 2020 Audi A4.
Enter your confirmed baseline wheel and tire in the “Custom wheel size” and “Custom tire size” boxes if they differ from the prefilled values.
Remember the calculator links rim diameter to tire diameter. Increasing rim diameter will update the compared tire’s overall diameter accordingly.
3) Compare a donor wheel
In “Wheels from (donor vehicle)”, enter the donor wheel’s diameter, width, and offset. If it is an aftermarket wheel, use the exact specs stamped on the wheel.
Check bolt pattern against 5x112 and center bore against 66.6 mm. A larger wheel bore can be adapted with hub-centric rings. A smaller bore will not fit over the hub.
Confirm thread size M14 x 1.5 and verify bolt seat type matches the wheel’s seat design. Do not mix ball and cone seats.
4) Assess clearance and stance
Review inner clearance to the strut and brake components and outer “poke” relative to the fender in the calculator comparison.
Use the offset and width sliders to bring the wheel within safe clearances. Avoid contact under compression or at full steering lock.
Keep overall tire diameter close to OEM. A change within a small percentage range is typically recommended to help maintain speedometer and driver-assistance behavior.
5) Plan hardware and install details
Use hub-centric rings if the wheel bore is larger than 66.6 mm. Pick the correct outer diameter for your specific wheel.
Select the correct length and seat-style wheel bolts. Length must account for wheel pad thickness and any ring or spacer used.
Use a wheel hanger tool during installation for safety and to protect threads.
Tighten in a crisscross pattern to the torque specified in your owner’s manual. Recheck torque after a short drive.
Validation
Hand-rotate the wheel
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.
