29.9" tall, 9.3" wide, 6.9" sidewall
A 235/75R16 tire is 29.9 inches (759 mm) tall and 9.3 inches wide. The sidewall is 75% of the width, 6.9 inches, on a 16-inch wheel, and the tire turns about 675 times per mile.
In flotation terms that is about 29.9x9.3R16. People often call it a 30-inch tire.
The size most often compared with it is 255/70R16, which is 0.2" taller (+0.6%). At an indicated 60 mph you would be doing 60.4 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 16" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 235/75R16 | |
|---|---|---|---|---|---|
| 255/70R16 | 30.1" | 10.0" | 7.0" | +0.6% | |
| 215/80R16 | 29.5" | 8.5" | 6.8" | −1.1% | |
| 245/70R16 | 29.5" | 9.6" | 6.8" | −1.3% | |
| 215/85R16 | 30.4" | 8.5" | 7.2" | +1.7% | |
| 245/75R16 | 30.5" | 9.6" | 7.2" | +2.0% | |
| 225/75R16 | 29.3" | 8.9" | 6.6" | −2.0% | |
| 225/85R16 | 31.1" | 8.9" | 7.5" | +4.0% | |
| 255/75R16 | 31.1" | 10.0" | 7.5" | +4.0% | |
| 245/65R16 | 28.5" | 9.6" | 6.3" | −4.5% | |
| 245/80R16 | 31.4" | 9.6" | 7.7" | +5.2% |
Sizes within 2% of 29.9" on 15" or 18" or 17" wheels.
| Size | Diameter | Width | Sidewall | vs 235/75R16 | |
|---|---|---|---|---|---|
| 315/60R15 | 29.9" | 12.4" | 7.4" | +0.0% | |
| 275/55R18 | 29.9" | 10.8" | 6.0" | +0.1% | |
| 235/70R17 | 30.0" | 9.3" | 6.5" | +0.3% | |
| 275/60R17 | 30.0" | 10.8" | 6.5" | +0.4% | |
| 30x9.50R15 | 30.0" | 9.5" | 7.5" | +0.4% | |
| 255/65R17 | 30.1" | 10.0" | 6.5" | +0.6% |
Actual speed when the speedometer is calibrated for 235/75R16.
| Speedometer shows | on 255/70R16 | on 215/80R16 | on 245/70R16 |
|---|---|---|---|
| 30 mph | 30.2 mph | 29.7 mph | 29.6 mph |
| 45 mph | 45.3 mph | 44.5 mph | 44.4 mph |
| 60 mph | 60.4 mph | 59.3 mph | 59.2 mph |
| 70 mph | 70.4 mph | 69.2 mph | 69.1 mph |
29.9 inches (759 mm). The sidewall is 6.9 inches.
9.3 inches (235 mm) section width, measured sidewall to sidewall.
About 29.9x9.3R16.
255/70R16 is +0.6% in diameter, within the common 3% guideline. It is 0.8" wider.