34.4" tall, 10.8" wide, 9.2" sidewall
A 275/85R16 tire is 34.4 inches (874 mm) tall and 10.8 inches wide. The sidewall is 85% of the width, 9.2 inches, on a 16-inch wheel, and the tire turns about 586 times per mile.
In flotation terms that is about 34.4x10.8R16. People often call it a 34-inch tire.
The size most often compared with it is 285/80R16, which is 0.5" shorter (−1.3%). At an indicated 60 mph you would be doing 59.2 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 275/85R16 | |
|---|---|---|---|---|---|
| 285/80R16 | 34.0" | 11.2" | 9.0" | −1.3% | |
| 265/85R16 | 33.7" | 10.4" | 8.9" | −1.9% | |
| 285/85R16 | 35.1" | 11.2" | 9.5" | +1.9% | |
| 295/75R16 | 33.4" | 11.6" | 8.7" | −2.9% | |
| 275/80R16 | 33.3" | 10.8" | 8.7" | −3.1% | |
| 255/85R16 | 33.1" | 10.0" | 8.5" | −3.9% | |
| 285/75R16 | 32.8" | 11.2" | 8.4" | −4.6% | |
| 265/80R16 | 32.7" | 10.4" | 8.3" | −5.0% | |
| 275/75R16 | 32.2" | 10.8" | 8.1" | −6.3% | |
| 255/80R16 | 32.1" | 10.0" | 8.0" | −6.8% |
Sizes within 2% of 34.4" on 17" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 275/85R16 | |
|---|---|---|---|---|---|
| 295/75R17 | 34.4" | 11.6" | 8.7" | +0.0% | |
| 315/70R17 | 34.4" | 12.4" | 8.7" | −0.1% | |
| 275/80R17 | 34.3" | 10.8" | 8.7" | −0.2% | |
| 295/70R18 | 34.3" | 11.6" | 8.1" | −0.4% | |
| 275/75R18 | 34.2" | 10.8" | 8.1" | −0.5% | |
| 325/65R18 | 34.6" | 12.8" | 8.3" | +0.7% |
Actual speed when the speedometer is calibrated for 275/85R16.
| Speedometer shows | on 285/80R16 | on 265/85R16 | on 285/85R16 |
|---|---|---|---|
| 30 mph | 29.6 mph | 29.4 mph | 30.6 mph |
| 45 mph | 44.4 mph | 44.1 mph | 45.9 mph |
| 60 mph | 59.2 mph | 58.8 mph | 61.2 mph |
| 70 mph | 69.1 mph | 68.6 mph | 71.4 mph |
34.4 inches (874 mm). The sidewall is 9.2 inches.
10.8 inches (275 mm) section width, measured sidewall to sidewall.
About 34.4x10.8R16.
285/80R16 is −1.3% in diameter, within the common 3% guideline. It is 0.4" wider.