2005 Mazda RX-8 Wheel Offset

Quick specs

Wheel size: Multiple — see configurations
Offset: Multiple — see configurations
Backspacing: Multiple — see configurations
Bolt pattern: 5×114.3
Center bore: 67.1 mm
Thread: M12×1.5
Tire size: Multiple — see configurations

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
1.3i MT · 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 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, 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 · 1.3L, 13B-MSP, R, Petrol	8.5x18	8x18	ET50	6.22 in	235/35R18 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i · 1.3L, 13B-MSP, R, Petrol	8x19	8x18	ET37 / ET50	5.46 in	215/40R19 / 225/45R18	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	8x18	8x17	ET55 / ET40	6.17 in	235/35R18 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	8x20	8x17	ET47 / ET40	5.85 in	225/50R20 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	8.5x16	8x17	ET45 / ET40	6.02 in	245/45R16 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	8x18	8x17	ET45 / ET40	5.77 in	225/60R18 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	9x19	8x17	ET55 / ET40	6.67 in	205/45R19 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	8.5x17	8x17	ET60 / ET40	6.61 in	205/45R17 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5
1.3i (ABA-SE3P) · 1.3L, R, Petrol	9x20	8x17	ET37 / ET40	5.96 in	245/50R20 / 225/50R17	5x114.3	67.1 mm	M12 x 1.5

Wheels and hardware

Lug hardware

Wheel locks

Real-World 2005 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:

18-inch — 12 documented builds
19-inch — 7 documented builds
17-inch — 1 documented build
20-inch — 1 documented build

23 documented builds.

DiameterLayout

Staggered · 18×9.5 ET15 / Rear unknown

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: MB wheels MB Battles

Front: 18×9.5 ET15 · 225/40R18
Rear: —

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 59 mm farther toward fender (more outward poke)
Inner edge 21 mm farther from suspension (more inner clearance)
Width +1.5" vs OEM

View full build on Modified1

Staggered · 18×9 ET30 / Rear unknown

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Rota G-Force

Front: 18×9 ET30
Rear: —

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 37.7 mm farther toward fender (more outward poke)
Inner edge 12.3 mm farther from suspension (more inner clearance)
Width +1" vs OEM

View full build on Modified1

Staggered · 19×8.5 ET36 / 19×9.5 ET29

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Work Meister S1

Front: 19×8.5 ET36 · 235/35R19
Rear: 19×9.5 ET29 · 165/30R19

Compared with OEM

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

Outer edge 17.3 mm farther toward fender (more outward poke)
Inner edge 4.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM

View full build on Modified1

Staggered · 18×9 ET31 / Rear unknown

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: AME Tracer FS-01

Front: 18×9 ET31
Rear: —

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 36.7 mm farther toward fender (more outward poke)
Inner edge 11.3 mm farther from suspension (more inner clearance)
Width +1" vs OEM

View full build on Modified1

Staggered · 18×8.5 ET30 / 18×9.5 ET40

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Front: 18×8.5 ET30
Rear: 18×9.5 ET40

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 31.3 mm farther toward fender (more outward poke)
Inner edge 18.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM

View full build on Modified1

19×9.5 ET42

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Tires: 275/30R19

Compared with OEM

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

Outer edge 24 mm farther toward fender (more outward poke)
Inner edge 14 mm closer to suspension (less inner clearance)
Width +1.5" vs OEM

View full build on Modified1

Staggered · 19×8.5 ET35 / 19×9.5 ET35

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Ruff Racing R278

Front: 19×8.5 ET35
Rear: 19×9.5 ET35

Compared with OEM

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

Outer edge 18.3 mm farther toward fender (more outward poke)
Inner edge 5.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM

View full build on Modified1

Staggered · 18×9 ET40 / Rear unknown

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Roja formula 5s

Front: 18×9 ET40 · 245/40R18
Rear: —

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 27.7 mm farther toward fender (more outward poke)
Inner edge 2.3 mm farther from suspension (more inner clearance)
Width +1" vs OEM

View full build on Modified1

Staggered · 17×8 ET7 / 17×9 ET32

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Blitz Type 01

Front: 17×8 ET7
Rear: 17×9 ET32

Compared with OEM

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

Outer edge 49.3 mm farther toward fender (more outward poke)
Inner edge 36.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM

View full build on Modified1

Staggered · 18×7.5 ET44 / Rear unknown

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: DownHillSpecial A033

Front: 18×7.5 ET44 · 225/45R18
Rear: —

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 4.7 mm farther toward fender (more outward poke)
Inner edge 17.3 mm farther from suspension (more inner clearance)
Width -0.5" vs OEM

View full build on Modified1

19×8.5 ET35

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Tires: 245/35R19

Compared with OEM

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

Outer edge 18.3 mm farther toward fender (more outward poke)
Inner edge 5.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM

View full build on Modified1

Staggered · 18×9.5 / Rear unknown

Documented on a 2005 Mazda RX-8 build — observed custom fitment, not a universal fit guarantee.

Wheel: Enkei RPF1

Front: 18×9.5 · 285/30R18
Rear: —

Compared with OEM

Compared with the 18×8 ET55 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Documented diameter × width pages

Aftermarket wheel sizes with enough documented Modified1 builds for this model year. Evidence pages — not fit guarantees.

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 2005 Mazda RX-8

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.