35.6" tall, 10.4" wide, 7.8" sidewall
A 265/75R20 tire is 35.6 inches (906 mm) tall and 10.4 inches wide. The sidewall is 75% of the width, 7.8 inches, on a 20-inch wheel, and the tire turns about 566 times per mile.
In flotation terms that is about 35.6x10.4R20. People often call it a 36-inch tire.
The size most often compared with it is 285/70R20, which is 0.1" taller (+0.2%). At an indicated 60 mph you would be doing 60.1 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 20" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 265/75R20 | |
|---|---|---|---|---|---|
| 285/70R20 | 35.7" | 11.2" | 7.9" | +0.2% | |
| 275/70R20 | 35.2" | 10.8" | 7.6" | −1.4% | |
| 275/75R20 | 36.2" | 10.8" | 8.1" | +1.7% | |
| 265/70R20 | 34.6" | 10.4" | 7.3" | −2.9% | |
| 285/65R20 | 34.6" | 11.2" | 7.3" | −3.0% | |
| 275/65R20 | 34.1" | 10.8" | 7.0" | −4.4% | |
| 265/65R20 | 33.6" | 10.4" | 6.8" | −5.9% | |
| 255/65R20 | 33.1" | 10.0" | 6.5" | −7.3% |
Sizes within 2% of 35.6" on 22" or 19" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 265/75R20 | |
|---|---|---|---|---|---|
| 245/70R22 | 35.5" | 9.6" | 6.8" | −0.4% | |
| 305/70R19 | 35.8" | 12.0" | 8.4" | +0.5% | |
| 285/60R22 | 35.5" | 11.2" | 6.7" | −0.5% | |
| 295/75R18 | 35.4" | 11.6" | 8.7" | −0.6% | |
| 325/70R18 | 35.9" | 12.8" | 9.0" | +0.7% | |
| 295/60R22 | 35.9" | 11.6" | 7.0" | +0.8% |
Actual speed when the speedometer is calibrated for 265/75R20.
| Speedometer shows | on 285/70R20 | on 275/70R20 | on 275/75R20 |
|---|---|---|---|
| 30 mph | 30.0 mph | 29.6 mph | 30.5 mph |
| 45 mph | 45.1 mph | 44.4 mph | 45.7 mph |
| 60 mph | 60.1 mph | 59.2 mph | 61.0 mph |
| 70 mph | 70.1 mph | 69.0 mph | 71.2 mph |
35.6 inches (906 mm). The sidewall is 7.8 inches.
10.4 inches (265 mm) section width, measured sidewall to sidewall.
About 35.6x10.4R20.
285/70R20 is +0.2% in diameter, within the common 3% guideline. It is 0.8" wider.