2008 Audi S8 Wheel Interchange

OEM wheel and tire fitment specs for the 2008 Audi S8, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.

Recorded OEM specifications for the 2008 Audi S8, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.

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Save these wheel specs to your Ownery garage

2008 Audi S8 Fitment Specs

Baseline mounting dimensions used for interchange decisions.

Bolt Pattern5x112
Center Bore57.1 mm
Lug ThreadM14 x 1.5 View M14 x 1.5 options on Amazon
OEM Wheel Sizes20" – 21"
OEM Widths9" – 10"
OEM Offset Range38 mm – 45 mm

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.

Explore wheels at Tire Rack

Selected size: 20 × 9″ · ET +45

Showing matching bolt patterns and offsets up to 20 mm lower. Confirm center bore, load rating, and clearance at Tire Rack.

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Donor vehicles with overlapping OEM specs

These are vehicle-year records whose recorded OEM ranges overlap this 2008 Audi S8. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.

Evaluated 143 donor years. Listed 24 eligible overlaps (not all evaluated years are compatible). Showing all listed.

2001–2003, 2007, 2009 Audi S8

OEM specs overlapOEM ranges overlap – confirm the specific wheel

Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.

  • 2001
  • 2002
  • 2003
  • 2007
  • 2009
  • Bolt pattern5x112 · Same recorded PCD
  • Center bore57.1 mm · same recorded hub figure
  • Wheel geometryOEM width/offset ranges overlap (not a specific wheel)

Approximate position vs the mid OEM package: outer change -2.85 mm, inner change -9.85 mm. This uses aggregated width/offset ranges, not a specific wheel.

2013–2018 Audi S8

Check wheel configurationCenter-bore records disagree

Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.

  • 2013
  • 2014
  • 2015
  • 2016
  • 2017
  • 2018
  • Bolt pattern5x112 · Same recorded PCD
  • Center bore66.5 mm donor vs hub 57.1 mm
  • Wheel geometryNeeds configuration check

Dataset suggestionHub-centric rings ≈ 66.5 → 57.1 mm – not a verified installation requirement.

See matching hub rings

Hub-centric rings of about 66.5 → 57.1 mm mm may be relevant if the wheel bore is larger than the hub; clearance is not verified. Donor width/offset sits outside the known OEM envelope for this vehicle.

2020–2022 Audi S8

Check wheel configurationWheel bore may need hub-centric rings; clearance unverified

Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.

  • 2020
  • 2021
  • 2022
  • Bolt pattern5x112 · Same recorded PCD
  • Center bore66.5 mm donor vs hub 57.1 mm
  • Wheel geometryOEM width/offset ranges overlap (not a specific wheel)

Dataset suggestionHub-centric rings ≈ 66.5 → 57.1 mm – not a verified installation requirement.

See matching hub rings

Hub-centric rings of about 66.5 → 57.1 mm mm may be relevant if the wheel bore is larger than the hub; they cannot enlarge a smaller bore. Approximate position vs the mid OEM package: outer change -1.85 mm, inner change -10.85 mm. This uses aggregated width/offset ranges, not a specific wheel.

2023 Audi S8

Insufficient dataInsufficient or mixed data
  • Bolt pattern5x112 · Same recorded PCD
  • Center bore66.5 mm donor vs hub 57.1 mm
  • Wheel geometryNot fully recorded

Dataset suggestionHub-centric rings ≈ 66.5 → 57.1 mm – not a verified installation requirement.

See matching hub rings

Wheel width/offset data is incomplete. Hub ring 66.5 → 57.1 mm may apply if mounting dimensions are otherwise compatible.

2004–2010 Audi A6

OEM specs overlapOEM ranges overlap – confirm the specific wheel

Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.

  • 2004
  • 2005
  • 2006
  • 2007
  • 2008
  • 2009
  • 2010
  • Bolt pattern5x112 · Same recorded PCD
  • Center bore57.1 mm · same recorded hub figure
  • Wheel geometryOEM width/offset ranges overlap (not a specific wheel)

Approximate position vs the mid OEM package: outer change -2.85 mm, inner change -9.85 mm. This uses aggregated width/offset ranges, not a specific wheel.

1999–2000 Audi A8

OEM specs overlapOEM ranges overlap – confirm the specific wheel

Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.

  • 1999
  • 2000
  • Bolt pattern5x112 · Same recorded PCD
  • Center bore57.1 mm · same recorded hub figure
  • Wheel geometryOEM width/offset ranges overlap (not a specific wheel)

Approximate position vs the mid OEM package: outer change -5.85 mm, inner change -6.85 mm. This uses aggregated width/offset ranges, not a specific wheel.

Audi S8 Years With Compatible Wheels

Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.

Will Wheels From Another Vehicle Fit?

Compare a donor vehicle or custom wheel against this 2008 Audi S8. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.

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Compare wheel compatibility between two vehicles

Wheels from (donor vehicle)

Installed on (your vehicle)

Selected Car:

2008 Audi S8

Compare Rims

Specification
Wheels from
Installed on
Result (Click it)
Bolt Pattern
Bolt Pattern
The total number of bolt holes and the diameter of the circle they form.
-
5x112
Center Bore
Center Bore
The hole in the center of the wheel that fits over the vehicle’s hub.
-
57.1 mm
Thread Size
Thread Size
The size and spacing of the threads on the bolts or nuts that hold the wheel in place.
-
M14 x 1.5
Rim Diameter
Rim Diameter
The wheel diameter in inches that determines which tire sizes will fit.
-
20"
Rim Width
Rim Width
The distance between the inner edges of the wheel is measured in inches.
-
9.0"
Wheel Offset
Wheel Offset
How far the wheel sits inward or outward relative to the hub mounting surface.
-
45 mm
Backspacing
Backspacing
Shows how much space the wheel takes up toward the inside of the vehicle.
-
-
Wheel Fasteners
Wheel Fasteners
The type of hardware used to secure the wheel to the vehicle.
-
-

Wheel Fitment Parts for the 2008 Audi S8

Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.

Lug Nuts / Wheel Bolts

M14 x 1.5

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2008 Audi S8 Wheel Fitment Guide | wheelinterchange.com

This page lists verified factory wheel and tire specifications for the 2008 Audi S8 and explains how to evaluate interchange options using the on-page calculator. If a value is not shown or may vary by market or trim, confirm it with your owner’s manual, an Audi dealer, or the calculator comparison before buying.

Known OEM Fitment For 2008 Audi S8

Bolt pattern (studs x PCD)5x112
Center bore (mm)57.1
Thread sizeM14 x 1.5
Rim diameter (in)20
Rim width (in)9.0
Wheel offset ET (mm)45
Backspacing (in)6.27
OEM tire size265/35R20

Notes: Audi typically uses wheel bolts, not studs and nuts. Seat type and bolt length can vary by wheel, so visually confirm the seat type on your wheel and check the owner’s manual or parts catalog before purchasing hardware. Torque specification is not listed here; use the owner’s manual or OEM service information.

How To Use The Wheel Interchange Calculator

  • In Wheels from (donor vehicle), enter the wheel and tire specs you are considering. You can also type a custom wheel size and custom tire size.
  • In Installed on (your vehicle), select 2008 Audi S8 or enter the OEM specs above.
  • Adjust custom wheel size fields for rim diameter, rim width, and offset. Adjust custom tire size for section width and aspect ratio. When you change rim diameter, the tool updates tire diameter in the comparison so you can keep overall diameter similar.
  • Review inner clearance at the strut and brake, outer poke at the fender, and the percent change in overall tire diameter.
  • Aim to keep overall tire diameter within about 2 to 3 percent of stock and ensure no interference at full steering lock and full suspension compression.

Fitment Checklist Before You Buy

  • Bolt pattern: New wheels must be 5x112.
  • Center bore: Must be 57.1 mm or larger. If larger, use hub-centric rings that reduce to 57.1 mm.
  • Wheel fasteners: Thread size is M14 x 1.5. Verify bolt length and seat type that match your wheels. Do not mix ball-seat and cone-seat hardware.
  • Offset and width: Compare your choice to the OEM 20x9 ET45 using the calculator to check inner clearance and outer poke.
  • Brake clearance: Visually test-fit to confirm spoke-to-caliper and barrel clearance, especially with larger brakes.
  • Tires: Choose a size with load index equal to or higher than OEM and keep overall diameter close to stock. Use the calculator to quantify the diameter change.
  • TPMS: 2008 S8 systems vary by market. If equipped with direct sensors, plan to transfer or replace them. If indirect, you will need to reset the system after installation.
  • Load rating: Wheels must meet or exceed the vehicle’s axle loads. Verify with the wheel manufacturer.

Plus Sizing And Common Upgrades

Plus sizing can improve appearance and response, but it changes clearance and ride. Use the calculator to simulate:

  • Plus one or minus one changes: Keep overall tire diameter within about 2 to 3 percent of stock to preserve gearing, speedometer accuracy, and ABS behavior.
  • Wider wheels and tires: Watch inner clearance to the suspension and outer fender poke. Small offset changes can make a big difference.
  • AWD considerations: The S8’s quattro system prefers equal rolling diameters. If you run staggered widths, keep tire diameters the same front and rear.
  • Ride and impact risk: Lower-profile tires reduce sidewall cushion. Check local road conditions before downsizing aspect ratio.

Installation Tips

  • Work on a cool vehicle on level ground. Chock wheels and use a properly rated floor jack and jack stands at approved lift points.
  • Loosen bolts a quarter turn before lifting. Support the car, remove bolts, and wheel.
  • Clean the hub face and center pilot with a wire brush. Remove corrosion so the wheel seats flush. Lightly clean the wheel mounting pad.
  • If using hub-centric rings, install them fully into the wheel bore. They must match 57.1 mm at the hub side.
  • Hand-start all bolts. Use a guide pin if available to protect threads and align heavy wheels.
  • Snug bolts in a star pattern. Lower the car and torque in a star pattern to the factory torque spec from your owner’s manual.
  • Re-torque after 50 to 100 miles. Reset TPMS per the owner’s manual.
  • Cycle steering lock-to-lock and drive over a speed bump slowly to confirm clearance under load.

Tools And Helpful Supplies

FAQs

  • What is the bolt pattern on the 2008 Audi S8?

    5x112.

  • What center bore does the 2008 S8 use?

    57.1 mm. If an aftermarket wheel has a larger bore, use hub-centric rings that reduce to 57.1 mm.

  • What fasteners does it use?

    M14 x 1.5 wheel bolts. Seat type and exact bolt length depend on the wheel. Verify the seat type visually and consult OEM documentation for torque.

  • What are the OEM wheel and tire sizes?

    Wheel: 20x9.0 ET45 with about 6.27 in backspacing. Tire: 265/35R20.

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

    Possibly, but you must match bolt pattern, ensure a 57.1 mm hub fit or use rings, and verify offset, width, brake clearance, and load rating. Use the calculator to compare the donor specs to the 2008 S8.

  • Can I run staggered wheels on the S8?

    Keep rolling diameter the same front and rear to protect the quattro AWD system. Staggered widths are possible if overall diameters match and clearances are verified.

  • What offset range works?

    Offset tolerance depends on wheel width and brake clearance. Start from the OEM ET45 20x9 and use the calculator to check inner and outer clearances for your exact wheel width and offset, then test-fit.

  • Do I need new TPMS sensors?

    It depends on your vehicle’s TPMS type. Some markets used indirect systems that only need a reset; others used direct sensors that must be transferred or replaced. Check your owner’s manual.

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
  • Lug thread / hardware differences (vehicle-side hardware)

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.

Nick Marchenko

Automotive Expert