30.6" tall, 11.2" wide, 7.3" sidewall
A 285/65R16 tire is 30.6 inches (777 mm) tall and 11.2 inches wide. The sidewall is 65% of the width, 7.3 inches, on a 16-inch wheel, and the tire turns about 659 times per mile.
In flotation terms that is about 30.6x11.2R16. People often call it a 31-inch tire.
The size most often compared with it is 265/70R16, which is 0.0" taller (+0.1%). At an indicated 60 mph you would be doing 60.0 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 285/65R16 | |
|---|---|---|---|---|---|
| 265/70R16 | 30.6" | 10.4" | 7.3" | +0.1% | |
| 275/65R16 | 30.1" | 10.8" | 7.0" | −1.7% | |
| 275/70R16 | 31.2" | 10.8" | 7.6" | +1.9% | |
| 265/65R16 | 29.6" | 10.4" | 6.8" | −3.3% | |
| 265/75R16 | 31.6" | 10.4" | 7.8" | +3.5% | |
| 285/70R16 | 31.7" | 11.2" | 7.9" | +3.7% | |
| 285/60R16 | 29.5" | 11.2" | 6.7" | −3.7% | |
| 275/60R16 | 29.0" | 10.8" | 6.5" | −5.2% | |
| 275/75R16 | 32.2" | 10.8" | 8.1" | +5.4% | |
| 295/70R16 | 32.3" | 11.6" | 8.1" | +5.5% |
Sizes within 2% of 30.6" on 17" or 18" or 15" wheels.
| Size | Diameter | Width | Sidewall | vs 285/65R16 | |
|---|---|---|---|---|---|
| 265/65R17 | 30.6" | 10.4" | 6.8" | −0.1% | |
| 245/65R18 | 30.5" | 9.6" | 6.3" | −0.2% | |
| 315/55R17 | 30.6" | 12.4" | 6.8" | +0.2% | |
| 265/75R15 | 30.6" | 10.4" | 7.8" | +0.2% | |
| 245/70R17 | 30.5" | 9.6" | 6.8" | −0.3% | |
| 285/60R17 | 30.5" | 11.2" | 6.7" | −0.4% |
Actual speed when the speedometer is calibrated for 285/65R16.
| Speedometer shows | on 265/70R16 | on 275/65R16 | on 275/70R16 |
|---|---|---|---|
| 30 mph | 30.0 mph | 29.5 mph | 30.6 mph |
| 45 mph | 45.0 mph | 44.2 mph | 45.8 mph |
| 60 mph | 60.0 mph | 59.0 mph | 61.1 mph |
| 70 mph | 70.0 mph | 68.8 mph | 71.3 mph |
30.6 inches (777 mm). The sidewall is 7.3 inches.
11.2 inches (285 mm) section width, measured sidewall to sidewall.
About 30.6x11.2R16.
265/70R16 is +0.1% in diameter, within the common 3% guideline. It is 0.8" narrower.