36.1" tall, 11.2" wide, 9.5" sidewall
A 285/85R17 tire is 36.1 inches (916 mm) tall and 11.2 inches wide. The sidewall is 85% of the width, 9.5 inches, on a 17-inch wheel, and the tire turns about 559 times per mile.
In flotation terms that is about 36.1x11.2R17. People often call it a 36-inch tire.
The size most often compared with it is 295/80R17, which is 0.5" shorter (−1.4%). At an indicated 60 mph you would be doing 59.2 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 17" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 285/85R17 | |
|---|---|---|---|---|---|
| 295/80R17 | 35.6" | 11.6" | 9.3" | −1.4% | |
| 275/85R17 | 35.4" | 10.8" | 9.2" | −1.9% | |
| 305/75R17 | 35.0" | 12.0" | 9.0" | −2.9% | |
| 35x11.50R17 | 35.0" | 11.5" | 9.0" | −3.0% | |
| 285/80R17 | 35.0" | 11.2" | 9.0" | −3.1% | |
| 265/85R17 | 34.7" | 10.4" | 8.9" | −3.7% | |
| 295/75R17 | 34.4" | 11.6" | 8.7" | −4.6% | |
| 275/80R17 | 34.3" | 10.8" | 8.7" | −4.9% | |
| 285/75R17 | 33.8" | 11.2" | 8.4" | −6.2% | |
| 265/80R17 | 33.7" | 10.4" | 8.3" | −6.6% |
Sizes within 2% of 36.1" on 18" or 16" or 19" wheels.
| Size | Diameter | Width | Sidewall | vs 285/85R17 | |
|---|---|---|---|---|---|
| 305/75R18 | 36.0" | 12.0" | 9.0" | −0.2% | |
| 285/80R18 | 36.0" | 11.2" | 9.0" | −0.3% | |
| 325/70R18 | 35.9" | 12.8" | 9.0" | −0.4% | |
| 315/80R16 | 35.8" | 12.4" | 9.9" | −0.6% | |
| 305/70R19 | 35.8" | 12.0" | 8.4" | −0.7% | |
| 275/85R18 | 36.4" | 10.8" | 9.2" | +0.9% |
Actual speed when the speedometer is calibrated for 285/85R17.
| Speedometer shows | on 295/80R17 | on 275/85R17 | on 305/75R17 |
|---|---|---|---|
| 30 mph | 29.6 mph | 29.4 mph | 29.1 mph |
| 45 mph | 44.4 mph | 44.2 mph | 43.7 mph |
| 60 mph | 59.2 mph | 58.9 mph | 58.2 mph |
| 70 mph | 69.0 mph | 68.7 mph | 67.9 mph |
36.1 inches (916 mm). The sidewall is 9.5 inches.
11.2 inches (285 mm) section width, measured sidewall to sidewall.
About 36.1x11.2R17.
295/80R17 is −1.4% in diameter, within the common 3% guideline. It is 0.4" wider.