32.7" tall, 10.4" wide, 8.9" sidewall
A 265/85R15 tire is 32.7 inches (832 mm) tall and 10.4 inches wide. The sidewall is 85% of the width, 8.9 inches, on a 15-inch wheel, and the tire turns about 616 times per mile.
In flotation terms that is about 32.7x10.4R15, closest to the common 33x10.50R15 (33.0"). People often call it a 33-inch tire.
The size most often compared with it is 33x10.50R15, which is 0.3" taller (+0.8%). At an indicated 60 mph you would be doing 60.5 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
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Same 15" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 265/85R15 | |
|---|---|---|---|---|---|
| 33x10.50R15 | 33.0" | 10.5" | 9.0" | +0.8% | |
| 255/85R15 | 32.1" | 10.0" | 8.5" | −2.0% | |
| 285/75R15 | 31.8" | 11.2" | 8.4" | −2.8% | |
| 275/75R15 | 31.2" | 10.8" | 8.1" | −4.6% | |
| 31x10.50R15 | 31.0" | 10.5" | 8.0" | −5.3% | |
| 265/75R15 | 30.6" | 10.4" | 7.8" | −6.4% | |
| 255/75R15 | 30.1" | 10.0" | 7.5" | −8.2% | |
| 245/75R15 | 29.5" | 9.6" | 7.2" | −10.0% |
Sizes within 2% of 32.7" on 17" or 16" wheels.
| Size | Diameter | Width | Sidewall | vs 265/85R15 | |
|---|---|---|---|---|---|
| 235/85R17 | 32.7" | 9.3" | 7.9" | −0.0% | |
| 285/70R17 | 32.7" | 11.2" | 7.9" | −0.1% | |
| 265/80R16 | 32.7" | 10.4" | 8.3" | −0.1% | |
| 305/70R16 | 32.8" | 12.0" | 8.4" | +0.2% | |
| 265/75R17 | 32.6" | 10.4" | 7.8" | −0.3% | |
| 285/75R16 | 32.8" | 11.2" | 8.4" | +0.3% |
Actual speed when the speedometer is calibrated for 265/85R15.
| Speedometer shows | on 33x10.50R15 | on 255/85R15 | on 285/75R15 |
|---|---|---|---|
| 30 mph | 30.2 mph | 29.4 mph | 29.2 mph |
| 45 mph | 45.4 mph | 44.1 mph | 43.8 mph |
| 60 mph | 60.5 mph | 58.8 mph | 58.3 mph |
| 70 mph | 70.6 mph | 68.6 mph | 68.1 mph |
32.7 inches (832 mm). The sidewall is 8.9 inches.
10.4 inches (265 mm) section width, measured sidewall to sidewall.
About 32.7x10.4R15; the closest common flotation size is 33x10.50R15 at 33.0".
33x10.50R15 is +0.8% in diameter, within the common 3% guideline. It is 0.1" wider.