WheelOffset

2009 BMW Z4 Wheel Offset

ET29

Quick specs

OEM offset
ET29
Wheel size
8x17 · 8x18 · 8x19
Backspacing
5.14 in
Bolt pattern
5×120
Center bore
72.6 mm
Tire size
225/45R17 · 225/40R18 · 225/35R19

OEM configurations

ConfigurationFrontRearOffsetBackspacingTireBolt patternCenter boreThread
sDrive30i · 3.0L, N52B30, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive35i · 3.0L, N54B30, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive23i · 2.5L, N52B25A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive30i · 3.0L, N52B30A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive35i · 3.0L, N54B30A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive23i (ABA-LM25) · N52B25A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 x 1.5
sDrive35i (ABA-LM30) · N54B30A, I6, Petrol8x178x17ET295.14 in225/45R175x12072.6 mmM12 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: 17×8 ET29 · 225/45R17 · Front · sDrive30i · 3.0L, N52B30, I6, Petrol

  • Outer: +0 mm
  • Inner clearance: 0 mm unchanged

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Wheels and hardware for this vehicle

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Lug hardware

More on Amazon

  • White Knight Chrome M12x1.50 Bulge Acorn Lug Nut, 20 Count

    M12 x 1.5

    Matches M12 x 1.5 thread — confirm wheel seat style

    Check price on Amazon

  • White Knight 3807BK-20AM Black Chrome M12x1.50 Spline Lug Nut, 20 items

    M12 x 1.5

    Matches M12 x 1.5 thread — confirm wheel seat style

    Check price on Amazon

Wheel locks

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  • MCGARD Chrome Cone Seat M12 x 1.5 Wheel Locks

    M12 x 1.5 · lock

    Matches M12 x 1.5 — confirm seat style for your wheel

    Check price on Amazon

  • Gorilla Automotive Wheel Locks With Washer (M12x1.50)

    M12 x 1.5 · lock

    Matches M12 x 1.5 — confirm seat style for your wheel

    Check price on Amazon

Real-World 2009 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

1 documented build.

2009 BMW Z4 custom wheel setup

Staggered · 18×8.5 ET35 / Rear unknown

Documented on a 2009 BMW Z4 build — observed custom fitment, not a universal fit guarantee.

Wheel: BBS CH

Front
18×8.5 ET35 · 235/40R18
Rear
— · 255/35R18
Compared with OEM

Compared with the 17×8 ET29 OEM configuration. Calculated geometry only — not fit confirmation.

  • Outer edge 0.3 mm farther toward fender (more outward poke)
  • Inner edge 12.3 mm closer to suspension (less inner clearance)
  • Width +0.5" vs OEM
  • Diameter +1" vs OEM
View full build on Modified1

More specs for the 2009 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.