2020 Cadillac CT6-V tire size
Most common factory size
P245/40R20
- Factory sizes
- 1
- Across 1 trim
- Trims with no size
- 4
- Diameter
- 27.72 in
- Revs per mile
- 728
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P245/40R20 | AWD | 245 | 40 | 20 | 27.72 | 3.86 | 728 |
What P245/40R20 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 245 mm | Tread width. 9.6 in. |
| Sidewall | 40 | Sidewall height is 40% of the width. |
| Construction | R | Radial tire. |
| Rim | 20 in | Fits 20 in wheels. |
Other sizes that fit
Within 3% of the stock diameter. A common shop guideline, not a maker spec.
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 245/35R21 | 21 | 27.75 | +0.1% | 59.9 mph |
| 245/45R19 | 19 | 27.68 | -0.1% | 60.1 mph |
| 275/40R19 | 19 | 27.66 | -0.2% | 60.1 mph |
| 215/45R20 | 20 | 27.62 | -0.4% | 60.2 mph |
| 175/55R20 | 20 | 27.58 | -0.5% | 60.3 mph |
| 275/35R20 | 20 | 27.58 | -0.5% | 60.3 mph |
| 285/35R20 | 20 | 27.85 | +0.5% | 59.7 mph |
| 155/70R19 | 19 | 27.54 | -0.6% | 60.4 mph |
Checked against 292 factory sizes listed for 2009-2027 US models.
What this cannot tell you
Tire pressure is on the driver door sticker. Not in this data.
Optional wheel packages may differ.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ