30.0" tall, 10.8" wide, 6.5" sidewall
A 275/60R17 tire is 30.0 inches (762 mm) tall and 10.8 inches wide. The sidewall is 60% of the width, 6.5 inches, on a 17-inch wheel, and the tire turns about 672 times per mile.
In flotation terms that is about 30.0x10.8R17. People often call it a 30-inch tire.
The size most often compared with it is 265/70R17, which is 1.6" taller (+5.4%). At an indicated 60 mph you would be doing 63.2 mph on it, more than the 3% change many shops use as a limit.
| 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 275/60R17 | |
|---|---|---|---|---|---|
| 255/65R17 | 30.1" | 10.0" | 6.5" | +0.2% | |
| 265/60R17 | 29.5" | 10.4" | 6.3" | −1.6% | |
| 285/60R17 | 30.5" | 11.2" | 6.7" | +1.6% | |
| 265/65R17 | 30.6" | 10.4" | 6.8" | +1.9% | |
| 285/55R17 | 29.3" | 11.2" | 6.2" | −2.2% | |
| 255/70R17 | 31.1" | 10.0" | 7.0" | +3.5% | |
| 275/55R17 | 28.9" | 10.8" | 6.0" | −3.6% | |
| 275/65R17 | 31.1" | 10.8" | 7.0" | +3.6% | |
| 285/65R17 | 31.6" | 11.2" | 7.3" | +5.3% | |
| 265/70R17 | 31.6" | 10.4" | 7.3" | +5.4% | compare |
Sizes within 2% of 30.0" on 15" or 16" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 275/60R17 | |
|---|---|---|---|---|---|
| 30x9.50R15 | 30.0" | 9.5" | 7.5" | +0.0% | |
| 255/70R16 | 30.1" | 10.0" | 7.0" | +0.2% | |
| 255/75R15 | 30.1" | 10.0" | 7.5" | +0.2% | |
| 275/55R18 | 29.9" | 10.8" | 6.0" | −0.3% | |
| 275/65R16 | 30.1" | 10.8" | 7.0" | +0.3% | |
| 295/65R15 | 30.1" | 11.6" | 7.5" | +0.4% |
Actual speed when the speedometer is calibrated for 275/60R17.
| Speedometer shows | on 265/70R17 | on 255/65R17 | on 265/60R17 |
|---|---|---|---|
| 30 mph | 31.6 mph | 30.1 mph | 29.5 mph |
| 45 mph | 47.4 mph | 45.1 mph | 44.3 mph |
| 60 mph | 63.2 mph | 60.1 mph | 59.1 mph |
| 70 mph | 73.8 mph | 70.1 mph | 68.9 mph |
30.0 inches (762 mm). The sidewall is 6.5 inches.
10.8 inches (275 mm) section width, measured sidewall to sidewall.
About 30.0x10.8R17.
265/70R17 is +5.4% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.4" narrower.