1999 Acura RL Wheel Offset

ET55 · ET50 · ET45

Quick specs

OEM offset: ET55 · ET50 · ET45
Wheel size: 6.5x16 · 7x16 · 7.5x17 · 8x18
Backspacing: 5.42 in · 5.67 in · 5.72 in · 5.77 in
Bolt pattern: 5×114.3
Center bore: 64.1 mm
Tire size: 215/60R16 · 225/55R16 · 235/50R17 · 245/45R18

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
3.5i · V6, Petrol	6.5x16	—	ET55	5.42 in	215/60R16	5x114.3	64.1 mm	M12 x 1.5
3.5i · V6, Petrol	7x16	8.5x17	ET55 / ET60	5.67 in	225/55R16	5x114.3	64.1 mm	M12 x 1.5
3.5i · V6, Petrol	7.5x17	—	ET50	5.72 in	235/50R17	5x114.3	64.1 mm	M12 x 1.5
3.5i · V6, Petrol	8x18	—	ET45	5.77 in	245/45R18	5x114.3	64.1 mm	M12 x 1.5

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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 1999 Acura RL 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 — 1 documented build
20-inch — 1 documented build

2 documented builds.

Staggered · 19×8.5 ET35 / 19×10 ET44

Documented on a 1999 Acura RL build — observed custom fitment, not a universal fit guarantee.

Wheel: CCW SP500

Front: 19×8.5 ET35 · 215/35R19
Rear: 19×10 ET44 · 245/35R19

Compared with OEM

Compared with the 18×8 ET45 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 16.3 mm farther toward fender (more outward poke)
Inner edge 3.7 mm farther from suspension (more inner clearance)
Width +0.5" vs OEM
Diameter +1" vs OEM

View full build on Modified1

20×9.5 ET38

Documented on a 1999 Acura RL build — observed custom fitment, not a universal fit guarantee.

Tires: 225/35R20

Compared with OEM

Compared with the 18×8 ET45 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 26 mm farther toward fender (more outward poke)
Inner edge 12 mm closer to suspension (less inner clearance)
Width +1.5" vs OEM
Diameter +2" vs OEM

View full build on Modified1

More specs for the 1999 Acura RL

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.