2021 Cadillac CT4 tire sizes
The 2021 Cadillac CT4 came from the factory with 2 tire sizes on 17" to 18" wheels. The most common size is 235/40 R18. Pick your trim below.
2021 CT4 Luxury
Factory (OE) sizes
17"wheels
2021 CT4 Sport
Factory (OE) sizes
18"wheels
2021 CT4 V
Factory (OE) sizes
18"wheels
Optional sizes
19"wheels
How to read 235/40 R18
- 235
- Tread width in millimetres
- 40
- Sidewall height, % of width
- R
- Radial construction
- 18
- Wheel diameter in inches
Overall diameter: about 25.4" · Sidewall: 94 mm