29.5" tall, 8.5" wide, 6.8" sidewall
A 215/80R16 tire is 29.5 inches (750 mm) tall and 8.5 inches wide. The sidewall is 80% of the width, 6.8 inches, on a 16-inch wheel, and the tire turns about 683 times per mile.
In flotation terms that is about 29.5x8.5R16. People often call it a 30-inch tire.
The size most often compared with it is 225/75R16, which is 0.3" shorter (−0.9%). At an indicated 60 mph you would be doing 59.5 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 215/80R16 | |
|---|---|---|---|---|---|
| 225/75R16 | 29.3" | 8.9" | 6.6" | −0.9% | |
| 235/75R16 | 29.9" | 9.3" | 6.9" | +1.1% | |
| 205/80R16 | 28.9" | 8.1" | 6.5" | −2.1% | |
| 215/85R16 | 30.4" | 8.5" | 7.2" | +2.9% | |
| 225/85R16 | 31.1" | 8.9" | 7.5" | +5.1% | |
| 235/85R16 | 31.7" | 9.3" | 7.9" | +7.4% |
Sizes within 2% of 29.5" on 17" or 15" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 215/80R16 | |
|---|---|---|---|---|---|
| 265/60R17 | 29.5" | 10.4" | 6.3" | −0.1% | |
| 265/70R15 | 29.6" | 10.4" | 7.3" | +0.2% | |
| 265/55R18 | 29.5" | 10.4" | 5.7" | −0.2% | |
| 245/75R15 | 29.5" | 9.6" | 7.2" | −0.3% | |
| 225/70R17 | 29.4" | 8.9" | 6.2" | −0.5% | |
| 315/50R17 | 29.4" | 12.4" | 6.2" | −0.5% |
Actual speed when the speedometer is calibrated for 215/80R16.
| Speedometer shows | on 225/75R16 | on 235/75R16 | on 205/80R16 |
|---|---|---|---|
| 30 mph | 29.7 mph | 30.3 mph | 29.4 mph |
| 45 mph | 44.6 mph | 45.5 mph | 44.0 mph |
| 60 mph | 59.5 mph | 60.7 mph | 58.7 mph |
| 70 mph | 69.4 mph | 70.8 mph | 68.5 mph |
29.5 inches (750 mm). The sidewall is 6.8 inches.
8.5 inches (215 mm) section width, measured sidewall to sidewall.
About 29.5x8.5R16.
225/75R16 is −0.9% in diameter, within the common 3% guideline. It is 0.4" wider.