2013 Audi S8 Wheel Interchange

2013 Audi S8 Wheel Fitment And Interchange Guide | wheelinterchange.com

Known OEM Fitment For 2013 Audi S8

The following specifications are what we currently have on file for the 2013 Audi S8. If a value seems inconsistent or your vehicle differs by package or market, verify against your door-jamb placard and the owner’s manual, then confirm dimensions with the on-page calculator.

Note: The wheel diameter listed is 21 in while the tire size listed is 265/40R20, which is a 20 in tire. This indicates we may have data from more than one factory package or only partial data. Do not mix a 20 in tire on a 21 in rim. Confirm your exact factory size with the door-jamb tire placard and Audi documentation, then use the calculator on this page to compare options accurately.

How To Use The Wheel Interchange Calculator

• Set Installed on to 2013 Audi S8. This locks your baseline clearances and rolling diameter reference.
• Choose a donor vehicle or select Custom wheel size to enter a candidate rim diameter, width, and offset. You can also enter a Custom tire size. The calculator will update overall tire diameter automatically.
• Review inner clearance and outer poke changes. Inner clearance relates to suspension and brake clearance. Outer poke relates to fender clearance.
• Check overall tire diameter difference. Many shops target less than about 2 to 3 percent change to keep speedometer and ABS behavior reasonable. For AWD, keep front and rear diameters matched.
• Iterate rim width and offset to keep poke near stock while maintaining or increasing inner clearance. Aim to keep at least a few millimeters of extra brake caliper clearance versus stock.
• When comparing donor wheels, ensure bolt pattern 5x112 and center bore 66.6 mm or larger. If larger, hubcentric rings are required to 66.6 mm. Thread size must be M14 x 1.5 and the correct seat type for the wheel.

Fitment Checklist Before You Buy

• Bolt pattern: Must be 5x112.
• Center bore: Hub must seat on 66.6 mm. If the wheel bore is larger, use hubcentric rings sized to 66.6 mm. Do not use a wheel with a smaller bore unless it is professionally machined.
• Fasteners: Audi typically uses lug bolts with M14 x 1.5 threads. Verify the bolt seat type required by the wheel manufacturer. OE wheels often use a ball seat while many aftermarket wheels use a cone seat. Seat type must match the wheel.
• Offset and width: Compare with the on-page calculator to confirm inner clearance to suspension and outer fender clearance. Avoid excessive poke and ensure no rubbing at full lock and full compression.
• Brake clearance: The S8 has large calipers. Test fit one front wheel and rotate by hand to confirm barrel and spoke clearance. There must be visible gap. Do not assume spoke templates from other models will apply.
• Tire load index and speed rating: Must meet or exceed the door-jamb placard.
• Overall diameter: Keep changes modest to maintain speedometer accuracy and driveline behavior. For AWD, front and rear rolling circumference must match.
• TPMS: Your S8 may use direct sensors or an indirect system depending on market. Check your owner’s manual and replicate the OE system if sensors are required.
• Spacers and rings: If spacers are used, they must be hubcentric and accompanied by appropriately longer M14 x 1.5 bolts. Spacers change effective offset and geometry. Validate with the calculator and a physical test fit.
• Verify torque spec: Lug bolt torque varies by model and market. Use the value in the owner’s manual or service information. Re-torque after a short drive.

Plus Sizing And Common Upgrades

Many owners consider different wheel and tire packages for appearance or performance. Because the 2013 Audi S8 is AWD, keep front and rear tire diameters matched and avoid large changes in rolling circumference. Use the calculator to:

• Evaluate a wider wheel while adjusting offset to maintain similar outer poke and safe inner clearance.
• Try a tire with a slightly different aspect ratio to maintain near-stock overall diameter.
• Check that a downsized winter package clears the brakes and maintains adequate load index if you are moving to a smaller rim diameter. Always confirm brake caliper clearance with a test fit.

If your car’s documentation shows different factory packages by trim or region, use the door placard and VIN-based parts catalog to identify your exact baseline, then compare in the calculator.

Installation Tips

• Prepare the hub: Clean rust and debris from the hub face and center lip. Apply a very thin film of high-temp anti-seize on the hub face only. Do not apply lubricant to lug bolt threads unless specifically instructed by Audi.
• Use a wheel hanger guide pin: This helps align heavy wheels on vehicles that use lug bolts.
• Torque correctly: Start bolts by hand, snug in a star pattern, lower the vehicle, then torque to the specification in your owner’s manual. Re-torque after 50 to 100 miles.
• Check clearances: After installation, turn steering lock to lock and drive over small bumps to listen for rubbing. Reinspect that brake lines and ABS wires are not contacted.
• TPMS and resets: If your market uses direct sensors, transfer or program sensors as required and perform the reset procedure outlined in the owner’s manual.

Tools And Helpful Supplies

• 1/2 inch drive torque wrench - for accurate final torque
  Search 1/2 inch torque wrench
• Wheel hanger guide pin M14 - simplifies mounting wheels with lug bolts
  Search wheel hanger guide pin M14
• Hubcentric rings 66.6 mm - only if wheel center bore is larger than 66.6 mm
  Search 66.6 hubcentric rings
• M14 x 1.5 lug bolts - correct length and seat type for your wheels
  Search M14x1.5 lug bolts

FAQs

• Can I use wheels from another 5x112 car on my 2013 S8?

  Possibly, but you must match more than bolt pattern. Center bore must be 66.6 mm or larger with hubcentric rings to 66.6 mm, the offset must provide safe inner and outer clearance, and the wheel must clear the S8’s large brakes. Always compare in the calculator and perform a test fit.

• What offset range works on the S8?

  Offset suitability depends on wheel width and brake clearance. Start by entering your current wheel size in the calculator, then adjust width and offset until inner clearance and outer poke remain safe. Use physical test fits to confirm brake and fender clearance before driving.

• My door placard shows a different tire size than listed above. Which is correct?

  Use your vehicle’s door-jamb placard and owner’s manual as primary sources. The table above may include partial data or a different factory package. Set the calculator to your placard size, then compare any alternatives against that baseline.

• Do I need hubcentric rings?

  If the wheel center bore is larger than 66.6 mm, yes. Install rings that reduce to 66.6 mm to ensure the wheel centers on the hub. If the wheel bore is exactly 66.6 mm, rings are not needed. Do not use wheels with a smaller bore.

• Are spacers safe on the S8?

  Quality hubcentric spacers can be used if needed for brake or spoke clearance, but they change effective offset and require longer M14 x 1.5 bolts with the correct seat type. Verify clearance and fastener engagement length. Check local regulations and re-torque after installation.

• Can I downsize to a 20 inch winter setup?

  Some S8 packages use different wheel diameters. Brake clearance is the primary constraint. Use the calculator to compare a 20 inch package and perform a front test fit to confirm caliper and barrel clearance. Match load index and keep rolling diameter close to stock.

• What lug bolt torque should I use?

  The correct torque is specified by Audi for your market. Refer to the owner’s manual or OEM service information. Do not guess. Torque in a star pattern and re-torque after a short drive.