| Configuration | Front | Rear | Offset | Backspacing | Tire | Bolt pattern | Center bore | Thread |
|---|---|---|---|---|---|---|---|---|
| 4.4i · LC3, V8, Petrol | 8x18 | 8.5x18 | ET51 | 6.01 in | 255/45R18 | 6x115 | 70.3 mm | M12 x 1.5 |
White Knight Chrome M12x1.50 Bulge Acorn Lug Nut, 20 Count
M12 x 1.5
Matches M12 x 1.5 thread — confirm wheel seat style
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White Knight 3807BK-20AM Black Chrome M12x1.50 Spline Lug Nut, 20 items
M12 x 1.5
Matches M12 x 1.5 thread — confirm wheel seat style
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MCGARD Chrome Cone Seat M12 x 1.5 Wheel Locks
M12 x 1.5 · lock
Matches M12 x 1.5 — confirm seat style for your wheel
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Gorilla Automotive Wheel Locks With Washer (M12x1.50)
M12 x 1.5 · lock
Matches M12 x 1.5 — confirm seat style for your wheel
Check price on AmazonObserved aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.
Among builds in our database for this model year:
1 documented build.
Documented on a 2009 Cadillac STS-V build — observed custom fitment, not a universal fit guarantee.
Wheel: Lexani R Six
Compared with the 18×8 ET51 OEM configuration. Calculated geometry only — not fit confirmation.
See how a different width or offset sits versus an OEM configuration for this year.
OEM: 18×8 ET51 · 255/45R18 · Front · 4.4i · LC3, V8, Petrol
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.