2006 Cadillac XLR Wheel Offset

Quick specs

Wheel size: 8.5x19 · 8x19 · 8x20 · 8x18
Offset: ET56 · ET61 · ET55 · ET51
Backspacing: 6.45 in · 6.40 in · 6.17 in · 6.01 in
Bolt pattern: 5×120.7, 5×120.65
Center bore: 70.1 mm, 70.3 mm
Thread: M12×1.5
Tire size: 255/40R19 · 235/45R19 · 235/40R20 · 235/50R18

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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
4.4i · 4.4L, LC3, V8, Petrol	8.5x19	8x19	ET56 / ET61	6.45 in	255/40R19 / 235/45R19	5x120.65	70.3 mm	M12 x 1.5
4.6i · 4.6L, LH2, V8, Petrol	8x18	8x18	ET51	6.01 in	235/50R18	5x120.65	70.3 mm	M12 x 1.5

Wheels and hardware

Lug hardware

Wheel locks

Real-World 2006 Cadillac XLR 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 2006 Cadillac XLR build — observed custom fitment, not a universal fit guarantee.

Wheel: Giovanna Spezia-5

Front: 19×?
Rear: —

Compared with OEM

Compared with the 19×8.5 ET56 OEM configuration. Calculated geometry only — not fit confirmation.

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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 2006 Cadillac XLR

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.