2018 Cadillac CT6 Wheel & Tire Sizes
Complete fitment guide for the 2018 Cadillac CT6: factory tire sizes, compatible wheel diameters, widths and offsets, and the 5x120 bolt pattern, for every trim.
Bolt Pattern
5x120
Centre Bore
66.9 mm
Lug nuts
M14 x 1.5
Torque: 150 Nm
TPMS
433 MHz
Factory (OEM) Tire Sizes for the 2018 Cadillac CT6
Front / square fitments
Rear (staggered fitments)
Click any size to shop tires in stock now, free shipping anywhere in Canada, optional installation at our 5 GTA locations.
2018 Cadillac CT6 Wheel Fitment by Trim
Compatible wheel diameter, width and offset ranges for each 2018 Cadillac CT6 configuration. Trims with different front and rear specs run a staggered setup.
2.0T · Saloon
Staggered2.0L · I4 · Hybrid
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 18–22" | 18–22" |
| Wheel width | 8–9" | 9–10.5" |
| Wheel offset | 25–40 mm | 34–46 mm |
| Tire width | 235–245 mm | 265 mm |
3.0T · Saloon
Staggered3.0L · V6 · Petrol
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 19–22" | 18–22" |
| Wheel width | 8.5–9" | 9–10.5" |
| Wheel offset | 25–40 mm | 34–46 mm |
| Tire width | 245–255 mm | 245–255 mm |
3.6i · Saloon
Staggered3.6L · V6 · Petrol
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 19–22" | 18–22" |
| Wheel width | 8.5–9" | 9–10.5" |
| Wheel offset | 25–40 mm | 34–46 mm |
| Tire width | 245–255 mm | 245–255 mm |
2018 Cadillac CT6 Fitment FAQ
What is the bolt pattern on a 2018 Cadillac CT6?
The 2018 Cadillac CT6 uses a 5x120 bolt pattern (5 lug nuts on a 120 mm circle) with a 66.9 mm centre bore.
What size tires fit a 2018 Cadillac CT6?
Factory (OEM) tire sizes for the 2018 Cadillac CT6 include 235/50R18, 245/45R19, 245/40R20, 245/40ZR20, 255/35ZR21; staggered rear fitments use 265/45R18. Always confirm against the placard inside the driver's door jamb.
What wheel sizes can I put on a 2018 Cadillac CT6?
Depending on trim, the 2018 Cadillac CT6 accepts wheels from 18" up to 22" in diameter with the correct width and offset, larger diameters typically require lower-profile tires to keep the overall rolling diameter stock.
What lug nut size does a 2018 Cadillac CT6 use?
The 2018 Cadillac CT6 uses M14 x 1.5 lug nuts, torqued to 150 Nm.
Fitment data is provided as a guide. Always verify sizes against your vehicle's door-jamb placard or with our fitment experts before ordering.