2018 Cadillac CT6 Wheel Offset
ET35 · ET33 · ET30
Quick specs
- OEM offset
- ET35 · ET33 · ET30
- Wheel size
- 8x18 · 8.5x20 · 8.5x19 · 9x21
- Backspacing
- 5.38 in · 5.55 in · 5.68 in
- Bolt pattern
- 5×120
- Center bore
- 66.9 mm
- Tire size
- 235/50R18 · 245/40R20 · 245/45R19 · 255/35R21
OEM configurations
| Configuration | Front | Rear | Offset | Backspacing | Tire | Bolt pattern | Center bore | Thread |
|---|---|---|---|---|---|---|---|---|
| 2.0T · 2.0L, LNF, I4, Hybrid | 8x18 | 8x18 | ET35 | 5.38 in | 235/50R18 | 5x120 | 66.9 mm | M14 x 1.5 |
| 2.0T · 2.0L, LNF, I4, Hybrid | 8.5x20 | 8x18 | ET33 / ET35 | 5.55 in | 245/40R20 / 235/50R18 | 5x120 | 66.9 mm | M14 x 1.5 |
| 3.0T · 3.0L, LGW, V6, Petrol | 8.5x20 | 8.5x19 | ET33 | 5.55 in | 245/40R20 / 245/45R19 | 5x120 | 66.9 mm | M14 x 1.5 |
| 3.0T · 3.0L, LGW, V6, Petrol | 9x21 | 8.5x19 | ET30 / ET33 | 5.68 in | 255/35R21 / 245/45R19 | 5x120 | 66.9 mm | M14 x 1.5 |
| 3.6i · 3.6L, LGX, V6, Petrol | 8.5x20 | 8.5x19 | ET33 | 5.55 in | 245/40R20 / 245/45R19 | 5x120 | 66.9 mm | M14 x 1.5 |
| 3.6i · 3.6L, LGX, V6, Petrol | 9x21 | 8.5x19 | ET30 / ET33 | 5.68 in | 255/35R21 / 245/45R19 | 5x120 | 66.9 mm | M14 x 1.5 |
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See how a different width or offset sits versus an OEM configuration for this year.
Wheels and hardware for this vehicle
More on AmazonLug hardware
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Wheel Accessories Parts Set of 20 Chrome 9/16 Spline Lug Nuts Open End Cone Seat Bulge Acorn Small Diameter Locking Lugs 9/16"-18 Thread, 1" Length Wheel Lug Nuts with Key (20, Chrome)
Confirmed vehicle catalog match. Confirm seat type for your wheel.
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Set of 20 Veritek 14x1.5mm Gloss Black Spline Drive Tuner Lug Nuts w/Key 1.40 Inch for Aftermarket Custom Wheels
Confirmed vehicle catalog match. Confirm seat type for your wheel.
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Wheel Accessories Parts 14x1.5 Lug Nuts Chrome Set of 20 Closed End Bulge Acorn Lug Nuts 1.38” Long M14x1.5 Thread Cone Seat 13/16” / 20.67mm (~21mm) Hex Wheel Lug Nut (Chrome, M14 x 1.5)
Confirmed vehicle catalog match. Confirm seat type for your wheel.
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Wheel locks
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White Knight Wheel Accessories 41900 Chrome M14x1.50 Open End Acorn Wheel Lock Set, 4 Count(Pack of 1), 14mm x 1.50
Confirmed vehicle catalog match. Confirm seat style for your wheel.
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More specs for the 2018 Cadillac CT6
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.