2015 Subaru WRX Wheel Offset

ET55

Quick specs

OEM offset: ET55
Wheel size: 8x17 · 8.5x18 · 8.5x19
Backspacing: 6.17 in · 6.42 in
Bolt pattern: 5×114.3
Center bore: 56.1 mm
Tire size: 235/45R17 · 245/40R18 · 245/35R19

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
2.0T · 2.0L, FA20, H4, Petrol	8x17	8.5x19	ET55	6.17 in	235/45R17 / 245/35R19	5x114.3	56.1 mm	M12 x 1.25
2.0T · 2.0L, FA20, H4, Petrol	8.5x18	8.5x19	ET55	6.42 in	245/40R18 / 245/35R19	5x114.3	56.1 mm	M12 x 1.25

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 2015 Subaru WRX 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 — 4 documented builds
19-inch — 1 documented build

5 documented builds.

Diameter

Staggered · 18×9.5 ET38 / Rear unknown

Documented on a 2015 Subaru WRX build — observed custom fitment, not a universal fit guarantee.

Wheel: Rota Grid

Front: 18×9.5 ET38
Rear: —

Compared with OEM

Compared with the 18×8.5 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 29.7 mm farther toward fender (more outward poke)
Inner edge 4.3 mm farther from suspension (more inner clearance)
Width +1" vs OEM

View full build on Modified1

Staggered · 18×9.5 ET35 / Rear unknown

Documented on a 2015 Subaru WRX build — observed custom fitment, not a universal fit guarantee.

Wheel: Rota Titan

Front: 18×9.5 ET35 · 265/35R18
Rear: —

Compared with OEM

Compared with the 18×8.5 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 32.7 mm farther toward fender (more outward poke)
Inner edge 7.3 mm farther from suspension (more inner clearance)
Width +1" vs OEM

View full build on Modified1

Staggered · 19×9.5 / Rear unknown

Documented on a 2015 Subaru WRX build — observed custom fitment, not a universal fit guarantee.

Wheel: Niche Milan - M134

Front: 19×9.5
Rear: —

Compared with OEM

Compared with the 18×8.5 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +1" vs OEM

View full build on Modified1

Staggered · 18×9 / Rear unknown

Documented on a 2015 Subaru WRX build — observed custom fitment, not a universal fit guarantee.

Wheel: Rota G-Force

Front: 18×9 · 245/35R18
Rear: —

Compared with OEM

Compared with the 18×8.5 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 18×8.5 / Rear unknown

Documented on a 2015 Subaru WRX build — observed custom fitment, not a universal fit guarantee.

Wheel: Rota SS10

Front: 18×8.5 · 245/40R18
Rear: —

Compared with OEM

Compared with the 18×8.5 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

More specs for the 2015 Subaru WRX

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.