2012 Buick Regal Wheel Offset

Quick specs

Wheel size: 8x18 · 8.5x19 · 8.5x20 · 7x17
Offset: ET42 · ET45 · ET47 · ET41
Backspacing: Multiple — see configurations
Bolt pattern: 5×120, 5×115
Center bore: 66.9 mm, 70.3 mm
Thread: M14×1.5
Tire size: Multiple — see configurations

Explore wheels at Tire Rack

Showing matching bolt patterns and offsets up to 30 mm lower. Confirm center bore, load rating, and clearance at Tire Rack.

Configuration

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OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
2.0T · 2.0L, I4, Petrol	8x18	9x18	ET42 / ET30	5.65 in	235/50R18	5x120	66.9 mm	M14 x 1.5
2.0T · 2.0L, I4, Petrol	8.5x19	—	ET45	6.02 in	245/40R19	5x120	66.9 mm	M14 x 1.5
2.0T · 2.0L, I4, Petrol	8.5x20	—	ET47	6.10 in	255/35R20	5x120	66.9 mm	M14 x 1.5
2.4i · I4, Petrol	7x17	—	ET41	5.11 in	235/50R17	5x120	66.9 mm	M14 x 1.5
2.4i · I4, Petrol	8x18	9x18	ET42 / ET30	5.65 in	235/50R18	5x120	66.9 mm	M14 x 1.5
2.4i · I4, Petrol	8.5x19	—	ET45	6.02 in	245/40R19	5x120	66.9 mm	M14 x 1.5
2.4i · I4, Petrol	8.5x20	—	ET47	6.10 in	255/35R20	5x120	66.9 mm	M14 x 1.5
2.4i · I4, Petrol	8x18	9x18	ET42 / ET30	5.65 in	245/45R18	5x115	70.3 mm	M14 x 1.5
1.6T · I4, Petrol	7x17	—	ET42	5.15 in	225/55R17	5x115	70.3 mm	M14 x 1.5
2.0T · I4, Petrol	8x18	9x18	ET42 / ET30	5.65 in	245/45R18	5x115	70.3 mm	M14 x 1.5
2.0i · I4, Petrol	7x17	—	ET42	5.15 in	225/55R17	5x115	70.3 mm	M14 x 1.5

Lug hardware

Wheel locks

Real-World 2012 Buick Regal 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

1 documented build.

Staggered · 19×? / Rear unknown

Documented on a 2012 Buick Regal build — observed custom fitment, not a universal fit guarantee.

Wheel: OEM Opel Insignia

Front: 19×?
Rear: —

Compared with OEM

Compared with the 19×8.5 ET45 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

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More specs for the 2012 Buick Regal

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.