2015 Subaru WRX Wheel Offset

Quick specs

Wheel size: 8x17 · 8.5x18 · 8.5x19
Offset: ET55
Backspacing: 6.17 in · 6.42 in
Bolt pattern: 5×114.3
Center bore: 56.1 mm
Thread: M12×1.25
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

Wheels and hardware

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

Compare your own setup

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

OEM baseline

Open full fitment calculator

More specs for the 2015 Subaru WRX

Each OEM row is a catalog configuration. Offset ranges are not collapsed when the database has exact setups. Documented aftermarket builds are observed setups only — not universal fit or clearance confirmation.