33.6" tall, 10.4" wide, 6.8" sidewall
A 265/65R20 tire is 33.6 inches (853 mm) tall and 10.4 inches wide. The sidewall is 65% of the width, 6.8 inches, on a 20-inch wheel, and the tire turns about 601 times per mile.
In flotation terms that is about 33.6x10.4R20, closest to the common 33x12.50R20 (33.0"). People often call it a 34-inch tire.
The size most often compared with it is 275/60R20, which is 0.6" shorter (−1.7%). At an indicated 60 mph you would be doing 59.0 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 265/65R20 | |
|---|---|---|---|---|---|
| 285/60R20 | 33.5" | 11.2" | 6.7" | −0.3% | |
| 275/65R20 | 34.1" | 10.8" | 7.0" | +1.5% | |
| 255/65R20 | 33.1" | 10.0" | 6.5" | −1.5% | |
| 275/60R20 | 33.0" | 10.8" | 6.5" | −1.7% | compare |
| 285/65R20 | 34.6" | 11.2" | 7.3" | +3.0% | |
| 265/70R20 | 34.6" | 10.4" | 7.3" | +3.1% | |
| 265/60R20 | 32.5" | 10.4" | 6.3" | −3.1% | |
| 285/55R20 | 32.3" | 11.2" | 6.2" | −3.6% | |
| 255/60R20 | 32.0" | 10.0" | 6.0" | −4.5% | |
| 275/70R20 | 35.2" | 10.8" | 7.6" | +4.8% |
Sizes within 2% of 33.6" on 19" or 18" or 22" wheels.
| Size | Diameter | Width | Sidewall | vs 265/65R20 | |
|---|---|---|---|---|---|
| 265/70R19 | 33.6" | 10.4" | 7.3" | +0.1% | |
| 305/65R18 | 33.6" | 12.0" | 7.8" | +0.1% | |
| 325/45R22 | 33.5" | 12.8" | 5.8" | −0.1% | |
| 295/50R22 | 33.6" | 11.6" | 5.8" | +0.2% | |
| 265/75R18 | 33.6" | 10.4" | 7.8" | +0.3% | |
| 245/75R19 | 33.5" | 9.6" | 7.2" | −0.3% |
Actual speed when the speedometer is calibrated for 265/65R20.
| Speedometer shows | on 275/60R20 | on 285/60R20 | on 275/65R20 |
|---|---|---|---|
| 30 mph | 29.5 mph | 29.9 mph | 30.5 mph |
| 45 mph | 44.2 mph | 44.9 mph | 45.7 mph |
| 60 mph | 59.0 mph | 59.8 mph | 60.9 mph |
| 70 mph | 68.8 mph | 69.8 mph | 71.1 mph |
33.6 inches (853 mm). The sidewall is 6.8 inches.
10.4 inches (265 mm) section width, measured sidewall to sidewall.
About 33.6x10.4R20; the closest common flotation size is 33x12.50R20 at 33.0".
275/60R20 is −1.7% in diameter, within the common 3% guideline. It is 0.4" wider.