1999 Mazda RX-7 Wheel Offset

Quick specs

Wheel size: Multiple — see configurations
Offset: ET50 · ET45 · ET60 · ET55
Backspacing: Multiple — see configurations
Bolt pattern: 5x114.3
Center bore: 67.1 mm
Thread: M12 x 1.5
Tire size: Multiple — see configurations

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
1.3 Turbo (E-FD3S) · 13B, R, Petrol	8x17	8x17	ET50	5.97 in	235/45R17	5x114.3	67.1 mm	M12 x 1.5
1.3 Turbo (E-FD3S) · 13B, R, Petrol	8x18	8x17	ET45 / ET50	5.77 in	235/40R18 / 235/45R17	5x114.3	67.1 mm	M12 x 1.5
1.3 Turbo (E-FD3S) · 13B, R, Petrol	8x16	8x17	ET50	5.97 in	225/50R16 / 235/45R17	5x114.3	67.1 mm	M12 x 1.5
1.3 Turbo (GF-FD3S) · 13B, R, Petrol	9x16	7x18	ET60 / ET50	6.86 in	235/50R16 / 225/35R18	5x114.3	67.1 mm	M12 x 1.5
1.3 Turbo (GF-FD3S) · 13B, R, Petrol	8.5x16	7x18	ET45 / ET50	6.02 in	245/40R16 / 225/35R18	5x114.3	67.1 mm	M12 x 1.5
1.3 Turbo (GF-FD3S) · 13B, R, Petrol	9x16	7x18	ET60 / ET50	6.86 in	235/40R16 / 225/35R18	5x114.3	67.1 mm	M12 x 1.5

Lug hardware

Real-World 1999 Mazda RX-7 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
19-inch — 1 documented build

2 documented builds.

Staggered · 19×9.5 ET28 / 19×10.5 ET28

Documented on a 1999 Mazda RX-7 build — observed custom fitment, not a universal fit guarantee.

Wheel: Volk Racing GTS

Front: 19×9.5 ET28 · 225/35R19
Rear: 19×10.5 ET28 · 265/30R19

Compared with OEM

Compared with the 16×8.5 ET45 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
Diameter +3" vs OEM

View full build on Modified1

Staggered · 18×9.5 ET20 / 18×9.5 ET20

Documented on a 1999 Mazda RX-7 build — observed custom fitment, not a universal fit guarantee.

Wheel: Work Emotion XT7

Front: 18×9.5 ET20 · 235/40R18
Rear: 18×9.5 ET20 · 265/35R18

Compared with OEM

Compared with the 16×8.5 ET45 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
Diameter +2" vs OEM

View full build on Modified1

More specs for the 1999 Mazda RX-7

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.