2009 Audi S8 Wheel Interchange

OEM wheel and tire fitment specs for the 2009 Audi S8, including bolt pattern (PCD), center bore diameter, thread size, rim diameter, rim width, wheel offset, and backspacing.

Recorded OEM specifications for the 2009 Audi S8, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.

Start a donor comparison

Save these wheel specs to your Ownery garage

2009 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.

We may earn a commission when you buy through these links. Prices and availability may change.

Donor vehicles with overlapping OEM specs

These are vehicle-year records whose recorded OEM ranges overlap this 2009 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, 2007–2008 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
  • 2008
  • 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 2009 Audi S8. 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)

Installed on (your vehicle)

Selected Car:

2009 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 2009 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

As an Amazon Associate we earn from qualifying purchases. Product availability and pricing may change.

tl;dr

  • OEM baseline for 2009 Audi S8: 20x9 ET45 with 265/35R20.
  • Bolt pattern 5x112. Center bore 57.1 mm. Thread M14 x 1.5.
  • Backspacing is 6.27 in. Use hub centering on 57.1 mm.
  • Use the on-page calculator to compare changes before you buy.
  • Confirm torque value and lug seat type in OEM sources.

Recommendation

Start from the factory spec and make small, measured changes. Use the wheelinterchange.com calculator to compare any donor wheel or custom size against your S8. Keep overall tire diameter close to the OEM tire to protect speedometer accuracy and driver aids. Maintain hub centering on 57.1 mm. Verify brake and fender clearance before mounting tires. If anything is unknown, confirm it with the calculator and your OEM documentation.

Impact

Offset and track width

Offset changes move the wheel in or out. More positive ET tucks the wheel inboard. Less positive ET pushes it outward. Inboard moves risk suspension and liner contact under compression. Outboard moves risk fender or arch contact on bumps and turns. The calculator shows these shifts in millimeters so you can visualize the change.

Width and clearance

Wider rims add tire section width and bulge depending on tire choice. Inner clearance to struts and control arms is the usual limit. Outer clearance to the fender lip is the next constraint. The calculator compares inner and outer positions versus OEM, which helps you gauge safe room.

Tire diameter and ride

Tire outside diameter affects speedometer, gearing feel, and ABS stability tuning. The calculator updates tire diameter when you change rim diameter, so you can keep total diameter close to stock. That preserves handling balance and avoids false ABS or stability events.

Hub, bolts, and vibration

Your hub bore is 57.1 mm. Aftermarket wheels with larger bores need 57.1 rings to stay hubcentric. Smaller bores do not fit. Thread size is M14 x 1.5. Lug seat type can vary by wheel, so match the seat to the wheel design. Mismatched seats can loosen and cause vibration.

Risks

  • Brake caliper spoke contact from low offset or wrong spoke profile.
  • Inner liner or knuckle rub under load with wider setups.
  • Outer fender contact on compression or full lock turns.
  • Vibration from running lugcentric without proper 57.1 rings.
  • Lug seat mismatch causing bolt loosening or damaged seats.
  • Incorrect bolt length bottoming in hubs or not engaging enough threads.
  • Speedometer error and stability control quirks from big tire diameter changes.
  • TPMS compatibility can vary by market and equipment. Confirm on your car.

Next actions

Checklist

  • Confirm the baseline below matches your trim and build.
  • Open the on-page calculator. Set Installed on to 2009 Audi S8.
  • Compare a donor wheel or enter Custom wheel size and Custom tire size.
  • Review inner clearance, outer poke, and tire diameter differences.
  • Check brake spoke clearance using a straight edge and ruler after a test fit.
  • Verify hub bore 57.1 mm. Plan hubcentric rings if the wheel bore is larger.
  • Match lug seat type to the wheel. Confirm M14 x 1.5 thread.
  • Torque to OEM spec in a star pattern. Recheck after 50–100 miles.

How to confirm unknowns

  • Torque spec and lug seat type: owner’s manual or OEM service info.
  • Brake clearance: use the calculator, then test fit with no tire, rotate, and inspect.
  • Fender clearance: load the suspension and steer to full lock both directions.
  • TPMS type: check your cluster, valve stems, or parts catalog for your VIN.

Known OEM fitment for 2009 Audi S8

SpecValue
Bolt pattern5x112
Center bore57.1 mm
Thread sizeM14 x 1.5
Rim size20 x 9.0 in
Wheel offsetET45
Backspacing6.27 in
Tire size265/35R20

Gotchas

  • Do not force smaller hub bores onto a 57.1 hub. They will not fit.
  • Do not rely on lug bolts to center the wheel. Use proper rings if needed.
  • Do not guess bolt length or seat type. Verify against your wheel design.
  • Spacers and extended hardware require precise measurements and quality parts. Measure first.

Helpful tools

If any value differs by trim or region, use the calculator and OEM sources to confirm before purchase. Small, verified changes reduce risk and keep the S8 driving as intended.

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