2009 Mazda RX-8 Wheel Offset

ET50 · ET47 · ET45

Quick specs

OEM offset: ET50 · ET47 · ET45
Wheel size: 7.5x16 · 7.5x17 · 8x18 · 8x19
Backspacing: 5.72 in · 5.97 in · 5.85 in · 5.77 in
Bolt pattern: 5×114.3
Center bore: 67.1 mm
Tire size: Multiple — see configurations

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
1.3i AT · 1.3L, R, Petrol	7.5x16	8x18	ET50	5.72 in	225/55R16 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i AT · 1.3L, R, Petrol	7.5x17	8x18	ET50	5.72 in	225/50R17 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i · 1.3L, R, Petrol	8x19	8x18	ET47 / ET50	5.85 in	225/40R19 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i · 1.3L, 13B-MSP, R, Petrol	8x19	8x18	ET47 / ET50	5.85 in	225/40R19 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	7.5x16	8x18	ET50	5.72 in	225/55R16 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	7.5x17	8x18	ET50	5.72 in	225/50R17 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	8x19	8x18	ET47 / ET50	5.85 in	225/40R19 / 225/45R18	5x114.3	67.1 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 2009 Mazda RX-8 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 — 6 documented builds
18-inch — 5 documented builds
17-inch — 1 documented build

12 documented builds.

Diameter

Staggered · 19×8 ET35 / 19×9 ET44

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Volk CE28N

Front: 19×8 ET35 · 245/35R19
Rear: 19×9 ET44 · 275/30R19

Compared with OEM

Compared with the 19×8 ET47 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 12 mm farther toward fender (more outward poke)
Inner edge 12 mm farther from suspension (more inner clearance)

View full build on Modified1

Staggered · 19×8.5 ET30 / 19×9.5 ET22

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Front: 19×8.5 ET30 · 235/35R19
Rear: 19×9.5 ET22 · 275/35R19

Compared with OEM

Compared with the 19×8 ET47 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 23.3 mm farther toward fender (more outward poke)
Inner edge 10.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM

View full build on Modified1

Staggered · 18×9 ET45 / Rear unknown

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: MB Weapons

Front: 18×9 ET45
Rear: —

Compared with OEM

Compared with the 17×7.5 ET50 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 24 mm farther toward fender (more outward poke)
Inner edge 14.1 mm closer to suspension (less inner clearance)
Width +1.5" vs OEM
Diameter +1" vs OEM

View full build on Modified1

Staggered · 19×8.5 / 19×10

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Linea Corse LC 818

Front: 19×8.5 · 225/40R19
Rear: 19×10 · 255/35R19

Compared with OEM

Compared with the 19×8 ET47 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 19×8.5 / 19×9.5

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: HRE 545

Front: 19×8.5
Rear: 19×9.5

Compared with OEM

Compared with the 19×8 ET47 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 17×9 / Rear unknown

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Enkei RPM2

Front: 17×9
Rear: —

Compared with OEM

Compared with the 17×7.5 ET50 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 19×8.5 / Rear unknown

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Falken Koblenz

Front: 19×8.5
Rear: —

Compared with OEM

Compared with the 19×8 ET47 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 18×9 / Rear unknown

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Motegi MR116

Front: 18×9
Rear: —

Compared with OEM

Compared with the 17×7.5 ET50 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +1" vs OEM

View full build on Modified1

Staggered · 19×8.5 / 19×9.5

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Rays Games 99B

Front: 19×8.5
Rear: 19×9.5

Compared with OEM

Compared with the 19×8 ET47 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 18×8 / 18×9.5

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Front: 18×8
Rear: 18×9.5

Compared with OEM

Compared with the 17×7.5 ET50 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 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Rota G-Forces

Front: 18×9
Rear: —

Compared with OEM

Compared with the 17×7.5 ET50 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +1" vs OEM

View full build on Modified1

Staggered · 18×8.5 / Rear unknown

Documented on a 2009 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: MKW

Front: 18×8.5
Rear: —

Compared with OEM

Compared with the 17×7.5 ET50 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +1" vs OEM

View full build on Modified1

More specs for the 2009 Mazda RX-8

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.