31.1" tall, 10.8" wide, 7.0" sidewall
A 275/65R17 tire is 31.1 inches (789 mm) tall and 10.8 inches wide. The sidewall is 65% of the width, 7.0 inches, on a 17-inch wheel, and the tire turns about 649 times per mile.
In flotation terms that is about 31.1x10.8R17. People often call it a 31-inch tire.
The size most often compared with it is 255/70R17, which is 0.0" shorter (−0.1%). At an indicated 60 mph you would be doing 60.0 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 17" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 275/65R17 | |
|---|---|---|---|---|---|
| 255/70R17 | 31.1" | 10.0" | 7.0" | −0.1% | |
| 265/65R17 | 30.6" | 10.4" | 6.8" | −1.6% | |
| 285/65R17 | 31.6" | 11.2" | 7.3" | +1.6% | |
| 265/70R17 | 31.6" | 10.4" | 7.3" | +1.7% | |
| 285/60R17 | 30.5" | 11.2" | 6.7" | −2.0% | |
| 255/75R17 | 32.1" | 10.0" | 7.5" | +3.2% | |
| 255/65R17 | 30.1" | 10.0" | 6.5" | −3.3% | |
| 295/65R17 | 32.1" | 11.6" | 7.5" | +3.3% | |
| 275/60R17 | 30.0" | 10.8" | 6.5" | −3.5% | |
| 275/70R17 | 32.2" | 10.8" | 7.6" | +3.5% |
Sizes within 2% of 31.1" on 16" or 15" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 275/65R17 | |
|---|---|---|---|---|---|
| 225/85R16 | 31.1" | 8.9" | 7.5" | −0.1% | |
| 255/75R16 | 31.1" | 10.0" | 7.5" | −0.1% | |
| 31x10.50R15 | 31.0" | 10.5" | 8.0" | −0.2% | |
| 275/60R18 | 31.0" | 10.8" | 6.5" | −0.3% | |
| 275/70R16 | 31.2" | 10.8" | 7.6" | +0.3% | |
| 305/55R18 | 31.2" | 12.0" | 6.6" | +0.4% |
Actual speed when the speedometer is calibrated for 275/65R17.
| Speedometer shows | on 255/70R17 | on 265/65R17 | on 285/65R17 |
|---|---|---|---|
| 30 mph | 30.0 mph | 29.5 mph | 30.5 mph |
| 45 mph | 45.0 mph | 44.3 mph | 45.7 mph |
| 60 mph | 60.0 mph | 59.0 mph | 61.0 mph |
| 70 mph | 70.0 mph | 68.8 mph | 71.2 mph |
31.1 inches (789 mm). The sidewall is 7.0 inches.
10.8 inches (275 mm) section width, measured sidewall to sidewall.
About 31.1x10.8R17.
255/70R17 is −0.1% in diameter, within the common 3% guideline. It is 0.8" narrower.