2005 Audi S4 Wheel Offset

ET45 · ET38 · ET43 · ET41

Quick specs

OEM offset: ET45 · ET38 · ET43 · ET41
Wheel size: 8x18 · 7x17 · 8x19 · 8.5x20 · 8.5x19
Backspacing: 5.77 in · 5.00 in · 5.69 in · 5.86 in
Bolt pattern: 5×112
Center bore: 66.6 mm, 57.1 mm
Tire size: Multiple — see configurations

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
4.2i · 4.2L, V8, Petrol	8x18	8.5x19	ET45 / ET41	5.77 in	235/40R18 / 255/30R19	5x112	57.1 mm	M14 x 1.5
4.2i · 4.2L, V8, Petrol	7x17	8.5x19	ET38 / ET41	5.00 in	225/45R17 / 255/30R19	5x112	57.1 mm	M14 x 1.5
4.2i · 4.2L, V8, Petrol	8x19	8.5x19	ET43 / ET41	5.69 in	235/35R19 / 255/30R19	5x112	57.1 mm	M14 x 1.5
4.2i · 4.2L, V8, Petrol	8.5x20	8.5x19	ET41	5.86 in	245/30R20 / 255/30R19	5x112	57.1 mm	M14 x 1.5

See how a different wheel would sit See wheel backspacing

What happens if you change the offset?

Compare your own setup

See how a different width or offset sits versus an OEM configuration for this year.

OEM baseline

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Wheels and hardware for this vehicle

Lug hardware

Wheel locks

Real-World 2005 Audi S4 Wheel Setups

Observed aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.

Common custom wheel sizes

Among builds in our database for this model year:

19-inch — 2 documented builds
18-inch — 1 documented build

3 documented builds.

Staggered · 19×9 ET41 / Rear unknown

Documented on a 2005 Audi S4 build — observed custom fitment, not a universal fit guarantee.

Wheel: Bentley Continental GT Mulliner OEM

Front: 19×9 ET41 · 225/35R19
Rear: —

Compared with OEM

Compared with the 19×8 ET43 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 14.7 mm farther toward fender (more outward poke)
Inner edge 10.7 mm closer to suspension (less inner clearance)
Width +1" vs OEM

View full build on Modified1

Staggered · 19×8.5 / 19×9.5

Documented on a 2005 Audi S4 build — observed custom fitment, not a universal fit guarantee.

Wheel: Vertini Dynasty

Front: 19×8.5
Rear: 19×9.5

Compared with OEM

Compared with the 19×8 ET43 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 18×? / Rear unknown

Documented on a 2005 Audi S4 build — observed custom fitment, not a universal fit guarantee.

Wheel: FLIK Racing

Front: 18×? · 225/40R18
Rear: —

Compared with OEM

Compared with the 18×8 ET45 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

More specs for the 2005 Audi S4

OEM offsets are catalog configurations, not an aftermarket “safe ET range.” Matching offset alone does not confirm clearance. Documented custom builds are observed setups only.