34.1" tall, 10.8" wide, 7.0" sidewall
A 275/65R20 tire is 34.1 inches (866 mm) tall and 10.8 inches wide. The sidewall is 65% of the width, 7.0 inches, on a 20-inch wheel, and the tire turns about 592 times per mile.
In flotation terms that is about 34.1x10.8R20. People often call it a 34-inch tire.
The size most often compared with it is 275/60R20, which is 1.1" shorter (−3.2%). At an indicated 60 mph you would be doing 58.1 mph on it, more than the 3% change many shops use as a limit.
| 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 275/65R20 | |
|---|---|---|---|---|---|
| 295/60R20 | 33.9" | 11.6" | 7.0" | −0.4% | compare |
| 265/65R20 | 33.6" | 10.4" | 6.8" | −1.5% | |
| 285/65R20 | 34.6" | 11.2" | 7.3" | +1.5% | compare |
| 265/70R20 | 34.6" | 10.4" | 7.3" | +1.6% | |
| 285/60R20 | 33.5" | 11.2" | 6.7" | −1.8% | compare |
| 35x11.50R20 | 35.0" | 11.5" | 7.5" | +2.7% | |
| 255/65R20 | 33.1" | 10.0" | 6.5" | −3.0% | |
| 295/65R20 | 35.1" | 11.6" | 7.5" | +3.0% | compare |
| 275/60R20 | 33.0" | 10.8" | 6.5" | −3.2% | compare |
| 275/70R20 | 35.2" | 10.8" | 7.6" | +3.2% | compare |
Sizes within 2% of 34.1" on 18" or 22" wheels.
| Size | Diameter | Width | Sidewall | vs 275/65R20 | |
|---|---|---|---|---|---|
| 255/80R18 | 34.1" | 10.0" | 8.0" | −0.0% | |
| 315/65R18 | 34.1" | 12.4" | 8.1" | +0.1% | |
| 305/50R22 | 34.0" | 12.0" | 6.0" | −0.2% | |
| 275/55R22 | 33.9" | 10.8" | 6.0" | −0.5% | |
| 275/75R18 | 34.2" | 10.8" | 8.1" | +0.5% | |
| 295/70R18 | 34.3" | 11.6" | 8.1" | +0.5% |
Actual speed when the speedometer is calibrated for 275/65R20.
| Speedometer shows | on 275/60R20 | on 35x12.50R20 | on 285/60R20 |
|---|---|---|---|
| 30 mph | 29.0 mph | 30.8 mph | 29.5 mph |
| 45 mph | 43.6 mph | 46.2 mph | 44.2 mph |
| 60 mph | 58.1 mph | 61.6 mph | 58.9 mph |
| 70 mph | 67.8 mph | 71.9 mph | 68.7 mph |
34.1 inches (866 mm). The sidewall is 7.0 inches.
10.8 inches (275 mm) section width, measured sidewall to sidewall.
About 34.1x10.8R20.
275/60R20 is −3.2% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.0" wider.