34.7" tall, 10.4" wide, 8.9" sidewall
A 265/85R17 tire is 34.7 inches (882 mm) tall and 10.4 inches wide. The sidewall is 85% of the width, 8.9 inches, on a 17-inch wheel, and the tire turns about 581 times per mile.
In flotation terms that is about 34.7x10.4R17, closest to the common 35x11.50R17 (35.0"). People often call it a 35-inch tire.
The size most often compared with it is 285/80R17, 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 17" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 265/85R17 | |
|---|---|---|---|---|---|
| 285/80R17 | 35.0" | 11.2" | 9.0" | +0.6% | |
| 275/80R17 | 34.3" | 10.8" | 8.7" | −1.2% | |
| 255/85R17 | 34.1" | 10.0" | 8.5" | −1.9% | |
| 275/85R17 | 35.4" | 10.8" | 9.2" | +1.9% | |
| 285/75R17 | 33.8" | 11.2" | 8.4" | −2.6% | |
| 265/80R17 | 33.7" | 10.4" | 8.3" | −3.0% | |
| 285/85R17 | 36.1" | 11.2" | 9.5" | +3.9% | |
| 245/85R17 | 33.4" | 9.6" | 8.2" | −3.9% | |
| 255/80R17 | 33.1" | 10.0" | 8.0" | −4.8% | |
| 265/75R17 | 32.6" | 10.4" | 7.8" | −6.0% |
Sizes within 2% of 34.7" on 18" or 16" or 15" wheels.
| Size | Diameter | Width | Sidewall | vs 265/85R17 | |
|---|---|---|---|---|---|
| 265/80R18 | 34.7" | 10.4" | 8.3" | −0.1% | |
| 305/70R18 | 34.8" | 12.0" | 8.4" | +0.2% | |
| 285/75R18 | 34.8" | 11.2" | 8.4" | +0.3% | |
| 325/65R18 | 34.6" | 12.8" | 8.3" | −0.3% | |
| 315/75R16 | 34.6" | 12.4" | 9.3" | −0.4% | |
| 35x12.50R15 | 35.0" | 12.5" | 10.0" | +0.8% |
Actual speed when the speedometer is calibrated for 265/85R17.
| Speedometer shows | on 285/80R17 | on 275/80R17 | on 255/85R17 |
|---|---|---|---|
| 30 mph | 30.2 mph | 29.6 mph | 29.4 mph |
| 45 mph | 45.3 mph | 44.5 mph | 44.1 mph |
| 60 mph | 60.4 mph | 59.3 mph | 58.8 mph |
| 70 mph | 70.4 mph | 69.2 mph | 68.7 mph |
34.7 inches (882 mm). The sidewall is 8.9 inches.
10.4 inches (265 mm) section width, measured sidewall to sidewall.
About 34.7x10.4R17; the closest common flotation size is 35x11.50R17 at 35.0".
285/80R17 is +0.6% in diameter, within the common 3% guideline. It is 0.8" wider.