2006 BMW Z4 Wheel Offset

ET46 · ET47 · ET41 · ET42

Quick specs

OEM offset: ET46 · ET47 · ET41 · ET42
Wheel size: 8x17 · 7x16 · 8x18 · 7.5x18
Backspacing: 5.81 in · 5.35 in · 5.85 in · 5.36 in · 5.65 in
Bolt pattern: 5×120
Center bore: 72.6 mm
Tire size: Multiple — see configurations

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
3.0i · 3.0L, N52B30, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
3.0i · 3.0L, N52B30, I6, Petrol	7x16	7x16	ET47	5.35 in	205/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
3.0si · 3.0L, N52B30, I6, Petrol	8x17	8x17	ET46	5.81 in	225/45R17	5x120	72.6 mm	M12 x 1.5
3.0si · 3.0L, N52B30, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.0i · 2.0L, N46B20, I4, Petrol	7x16	7x16	ET47	5.35 in	225/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.0i · 2.0L, N46B20, I4, Petrol	7x16	7x16	ET47	5.35 in	205/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.0i · 2.0L, N46B20, I4, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5i · N52B25A, I6, Petrol	7x16	7x16	ET47	5.35 in	225/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5i · N52B25A, I6, Petrol	7x16	7x16	ET47	5.35 in	205/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5i · N52B25A, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5si · 2.5L, N52B25A, I6, Petrol	7x16	7x16	ET47	5.35 in	225/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5si · 2.5L, N52B25A, I6, Petrol	7x16	7x16	ET47	5.35 in	205/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5si · 2.5L, N52B25A, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
M 3.2i · 3.2L, S54B32, I6, Petrol	7.5x18	8x18	ET41 / ET42	5.36 in	225/40R18 / 225/45R18	5x120	72.6 mm	M12 x 1.5
2.5i (ABA-BU25) · N52B25A, I6, Petrol	7x16	7x16	ET47	5.35 in	225/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5i (ABA-BU25) · N52B25A, I6, Petrol	7x16	7x16	ET47	5.35 in	205/55R16 / 225/50R16	5x120	72.6 mm	M12 x 1.5
2.5i (ABA-BU25) · N52B25A, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
3.0si (ABA-BU30) · N52B30A, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
3.0si (ABA-DU30) · N52B30A, I6, Petrol	8x17	7x16	ET46 / ET47	5.81 in	225/45R17 / 225/50R16	5x120	72.6 mm	M12 x 1.5
M Coupe (ABA-DU32) · 326S4, I6, Petrol	8x18	8x18	ET42	5.65 in	225/45R18	5x120	72.6 mm	M12 x 1.5
M Roadster (ABA-BT32) · 326S4, I6, Petrol	8x18	8x18	ET42	5.65 in	225/45R18	5x120	72.6 mm	M12 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 2006 BMW Z4 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:

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

2 documented builds.

Staggered · 19×8.5 ET35 / 19×9.5 ET22

Documented on a 2006 BMW Z4 build — observed custom fitment, not a universal fit guarantee.

Front: 19×8.5 ET35 · 245/35R19
Rear: 19×9.5 ET22 · 275/30R19

Compared with OEM

Compared with the 18×7.5 ET41 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 18.7 mm farther toward fender (more outward poke)
Inner edge 6.7 mm closer to suspension (less inner clearance)
Width +1" vs OEM
Diameter +1" vs OEM

View full build on Modified1

Staggered · 18×8.5 / 18×9.5

Documented on a 2006 BMW Z4 build — observed custom fitment, not a universal fit guarantee.

Wheel: EC-7

Front: 18×8.5 · 245/40R18
Rear: 18×9.5 · 275/35R18

Compared with OEM

Compared with the 18×7.5 ET41 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

More specs for the 2006 BMW Z4

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.