2021 Audi S8 Wheel Interchange

2021 Audi S8 Wheel Fitment Guide | wheelinterchange.com

Known OEM Fitment For 2021 Audi S8

The following specifications are known for the 2021 Audi S8. Trim levels and factory wheel packages can differ. If a value on your car does not match, confirm it on your door jamb tire placard and in the owner’s manual, then use the on-page calculator to compare against any potential donor wheel or custom setup.

Note: The wheel and tire data above indicate that multiple OEM configurations may exist. If your S8 has a different factory wheel or tire size, treat the above as reference only and verify your exact specs before purchasing wheels or tires.

How To Use The Wheel Interchange Calculator

• Installed on (your vehicle): The page should prefill 2021 Audi S8. If not, select it.
• Wheels from (donor vehicle): Choose the vehicle whose wheels you want to test, or pick a known wheel spec.
• Custom wheel size: Adjust rim diameter, width, and offset to simulate aftermarket wheels. The tool shows inner clearance and outer poke changes compared to your S8.
• Custom tire size: Adjust section width and aspect ratio to maintain overall diameter. When you change rim diameter, the calculator updates tire diameter in the comparison.
• Read the results: Aim to keep overall tire diameter similar to your OEM package, maintain safe inner clearance to suspension and brakes, and avoid excessive fender poke.

Fitment Checklist Before You Buy

• Bolt pattern: Must be 5x112.
• Center bore: Your hub is 66.5 mm. Aftermarket wheels with a larger center bore require hub centric rings sized to 66.5 mm outer diameter. Wheels with a smaller bore will not fit.
• Fasteners: Thread is M14 x 1.5. Verify bolt or nut seat type matches the wheel’s seat design and that length is correct, especially if using spacers.
• Offset: OEM example is ET 32 on an 8.0 inch rim. Use the calculator to visualize inner clearance to struts and outer position relative to the fender when changing width or offset.
• Brake clearance: The S8 has large brakes. Spoke profile and barrel shape matter. Always test fit over the front calipers.
• Tire diameter: Keep overall diameter close to stock for correct speedometer and ABS function. A change within about 3 percent is a common guideline, but always verify with the calculator.
• Load and speed ratings: Choose wheels and tires that meet or exceed the S8’s OEM ratings.
• TPMS: Plan to transfer sensors or install compatible new ones. Relearn procedures vary by system.
• OEM confirmation: Cross check your VIN sticker and owner’s manual. If your factory size differs from the values above, base your comparisons on your specific OEM setup.

Plus Sizing And Common Upgrades

Plus sizing means increasing wheel diameter and using a lower profile tire to keep overall diameter similar. Many performance sedans are upgraded by +1 or +2 sizes. For your S8, use the calculator to model options and verify inner and outer clearances, brake clearance, and tire diameter.

• Example workflow: If your reference is a 19x8 ET 32 wheel, try a larger diameter with an appropriate lower tire aspect ratio in the calculator until overall tire diameter closely matches your OEM package.
• Width changes: Increasing wheel width requires offset adjustments to avoid rubbing. The calculator will show how much poke changes and how much inner clearance you lose or gain.
• Spacers: If you need minor poke for caliper or inner barrel clearance, a hub-centric spacer with properly extended M14 x 1.5 bolts can be used. Recompute effective offset in the calculator.
• Ride and protection: Lower profile tires reduce sidewall cushion. Consider wheel protection and road conditions when plus sizing.

Installation Tips

• Test fit each front wheel without a tire first if possible to confirm caliper and barrel clearance.
• Clean the hub face and the wheel mounting pad. Remove corrosion to ensure proper seating and prevent vibration.
• If using hub-centric rings, install them fully seated in the wheel bore before mounting.
• Hand start all fasteners to avoid cross threading. If your car uses wheel bolts instead of nuts, a wheel hanger guide pin helps align the wheel.
• Tighten in a star pattern. Use a torque wrench and the torque value from your Audi owner’s manual. Do not rely on impact tools for final torque.
• Re-check torque after 50 to 100 miles of driving.
• Perform a full lock-to-lock turn test and drive over bumps to confirm no rubbing.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench
• M14x1.5 wheel bolts
• 66.5 mm hub centric rings
• Wheel hanger guide pin M14 x 1.5

FAQs

• Will 5x112 wheels from another Audi fit my 2021 S8?

  Possibly. The bolt pattern matches, but you must also match or adapt the 66.5 mm center bore, verify offset and width with the calculator, ensure brake clearance, and confirm load rating. Do not rely on bolt pattern alone.

• Do I need hub-centric rings?

  If your new wheels have a center bore larger than 66.5 mm, use rings that reduce the wheel bore to 66.5 mm. If the wheel bore is smaller than 66.5 mm, the wheel will not seat on the hub.

• What offset range will fit?

  It depends on wheel width and spoke design. Use the calculator to compare against the OEM example of 19x8 ET 32 and check inner clearance to suspension and outer fender poke. Always test fit over the brakes.

• What is the correct lug or bolt torque?

  The exact torque for the 2021 S8 is not provided here. Use the value in your Audi owner’s manual or service documentation and torque with a calibrated wrench.

• Can I use spacers on the S8?

  Yes, if needed for clearance or stance. Use quality hub-centric spacers and the correct extended M14 x 1.5 bolts. Recalculate effective offset in the calculator and confirm fender coverage and brake clearance.

• What tire size should I run on the OEM 19x8 wheel?

  Tire selection depends on target diameter, load rating, and the tire manufacturer’s approved rim width range. Use the calculator to match overall diameter to your OEM package and confirm with tire maker fitment charts.

• Will my TPMS work with new wheels?

  Yes, if you transfer compatible sensors or install new sensors that match your vehicle’s system. A relearn or initialization may be required. Follow the owner’s manual or service procedure.