2011 Cadillac STS tire sizes
The 2011 Cadillac STS came from the factory with 3 tire sizes on 17" to 18" wheels. The most common size is 255/45 R18. Some setups are staggered, with wider tires at the rear. Pick your trim below.
2011 STS Platinum
Factory (OE) sizes
18"wheels
Front235/50 R18Rear255/45 R18
2011 STS V6 AWD
Factory (OE) sizes
17"wheels
2011 STS V6 RWD
Factory (OE) sizes
17"wheels
2011 STS V6 RWD Performance Package
Factory (OE) sizes
18"wheels
Optional sizes
18"wheels
Front235/50 R18Rear255/45 R18
How to read 255/45 R18
- 255
- Tread width in millimetres
- 45
- Sidewall height, % of width
- R
- Radial construction
- 18
- Wheel diameter in inches
Overall diameter: about 27.0" · Sidewall: 115 mm