2021 BMW M4 tire size
Most common factory size
P275/40R18
- Factory sizes
- 1
- Across 2 trims
- Diameter
- 26.66 in
- Revs per mile
- 756
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P275/40R18 | All 2 trims | 275 | 40 | 18 | 26.66 | 4.33 | 756 |
What P275/40R18 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 275 mm | Tread width. 10.8 in. |
| Sidewall | 40 | Sidewall height is 40% of the width. |
| Construction | R | Radial tire. |
| Rim | 18 in | Fits 18 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 |
|---|---|---|---|---|
| 245/50R17 | 17 | 26.65 | -0.1% | 60.0 mph |
| 195/50R19 | 19 | 26.68 | +0.1% | 60.0 mph |
| 245/45R18 | 18 | 26.68 | +0.1% | 60.0 mph |
| 205/60R17 | 17 | 26.69 | +0.1% | 59.9 mph |
| 245/40R19 | 19 | 26.72 | +0.2% | 59.9 mph |
| 275/35R19 | 19 | 26.58 | -0.3% | 60.2 mph |
| 225/55R17 | 17 | 26.74 | +0.3% | 59.8 mph |
| 215/50R18 | 18 | 26.46 | -0.7% | 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