30.6" tall, 10.4" wide, 7.8" sidewall
A 265/75R15 tire is 30.6 inches (779 mm) tall and 10.4 inches wide. The sidewall is 75% of the width, 7.8 inches, on a 15-inch wheel, and the tire turns about 658 times per mile.
In flotation terms that is about 30.6x10.4R15, closest to the common 31x10.50R15 (31.0"). People often call it a 31-inch tire.
The size most often compared with it is 265/70R15, which is 1.0" shorter (−3.4%). At an indicated 60 mph you would be doing 58.0 mph on it, more than the 3% change many shops use as a limit.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 15" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 265/75R15 | |
|---|---|---|---|---|---|
| 285/70R15 | 30.7" | 11.2" | 7.9" | +0.2% | |
| 31x10.50R15 | 31.0" | 10.5" | 8.0" | +1.1% | compare |
| 275/70R15 | 30.2" | 10.8" | 7.6" | −1.6% | |
| 255/75R15 | 30.1" | 10.0" | 7.5" | −1.9% | |
| 275/75R15 | 31.2" | 10.8" | 8.1" | +1.9% | |
| 265/70R15 | 29.6" | 10.4" | 7.3" | −3.4% | compare |
| 285/75R15 | 31.8" | 11.2" | 8.4" | +3.9% | |
| 245/75R15 | 29.5" | 9.6" | 7.2" | −3.9% | |
| 255/85R15 | 32.1" | 10.0" | 8.5" | +4.6% | |
| 255/70R15 | 29.1" | 10.0" | 7.0" | −5.2% |
Sizes within 2% of 30.6" on 17" or 16" wheels.
| Size | Diameter | Width | Sidewall | vs 265/75R15 | |
|---|---|---|---|---|---|
| 315/55R17 | 30.6" | 12.4" | 6.8" | −0.0% | |
| 265/70R16 | 30.6" | 10.4" | 7.3" | −0.1% | |
| 285/65R16 | 30.6" | 11.2" | 7.3" | −0.2% | |
| 265/65R17 | 30.6" | 10.4" | 6.8" | −0.3% | |
| 245/70R17 | 30.5" | 9.6" | 6.8" | −0.5% | |
| 245/75R16 | 30.5" | 9.6" | 7.2" | −0.6% |
Actual speed when the speedometer is calibrated for 265/75R15.
| Speedometer shows | on 265/70R15 | on 31x10.50R15 | on 235/75R15 |
|---|---|---|---|
| 30 mph | 29.0 mph | 30.3 mph | 28.3 mph |
| 45 mph | 43.5 mph | 45.5 mph | 42.4 mph |
| 60 mph | 58.0 mph | 60.7 mph | 56.5 mph |
| 70 mph | 67.6 mph | 70.8 mph | 66.0 mph |
30.6 inches (779 mm). The sidewall is 7.8 inches.
10.4 inches (265 mm) section width, measured sidewall to sidewall.
About 30.6x10.4R15; the closest common flotation size is 31x10.50R15 at 31.0".
265/70R15 is −3.4% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.0" wider.