2021 Cadillac XT6 tire sizes
The 2021 Cadillac XT6 came from the factory with 3 tire sizes on 18" to 21" wheels. The most common size is 235/55 R20. Pick your trim below.
2021 XT6 Luxury
Factory (OE) sizes
18"wheels
Optional sizes
20"wheels
2021 XT6 Sport
Factory (OE) sizes
20"wheels
Optional sizes
21"wheels
How to read 235/55 R20
- 235
- Tread width in millimetres
- 55
- Sidewall height, % of width
- R
- Radial construction
- 20
- Wheel diameter in inches
Overall diameter: about 30.2" · Sidewall: 129 mm