28.0" tall, 10.8" wide, 6.5" sidewall
A 275/60R15 tire is 28.0 inches (711 mm) tall and 10.8 inches wide. The sidewall is 60% of the width, 6.5 inches, on a 15-inch wheel, and the tire turns about 720 times per mile.
In flotation terms that is about 28.0x10.8R15. People often call it a 28-inch tire.
The size most often compared with it is 295/50R15, which is 1.4" shorter (−4.9%). At an indicated 60 mph you would be doing 57.0 mph on it, more than the 3% change many shops use as a limit.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 15" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 275/60R15 | |
|---|---|---|---|---|---|
| 255/65R15 | 28.1" | 10.0" | 6.5" | +0.2% | |
| 295/55R15 | 27.8" | 11.6" | 6.4" | −0.8% | compare |
| 285/60R15 | 28.5" | 11.2" | 6.7" | +1.7% | |
| 265/65R15 | 28.6" | 10.4" | 6.8" | +2.0% | |
| 255/60R15 | 27.0" | 10.0" | 6.0" | −3.4% | compare |
| 295/60R15 | 28.9" | 11.6" | 7.0" | +3.4% | compare |
| 255/70R15 | 29.1" | 10.0" | 7.0" | +3.8% | compare |
| 275/55R15 | 26.9" | 10.8" | 6.0" | −3.9% | |
| 295/50R15 | 26.6" | 11.6" | 5.8" | −4.9% | compare |
| 265/70R15 | 29.6" | 10.4" | 7.3" | +5.8% |
Sizes within 2% of 28.0" on 17" or 16" wheels.
| Size | Diameter | Width | Sidewall | vs 275/60R15 | |
|---|---|---|---|---|---|
| 275/50R17 | 27.8" | 10.8" | 5.4" | −0.6% | |
| 245/55R17 | 27.6" | 9.6" | 5.3" | −1.4% | |
| 205/65R17 | 27.5" | 8.1" | 5.2" | −1.8% | |
| 325/45R17 | 28.5" | 12.8" | 5.8" | +1.9% | |
| 245/65R16 | 28.5" | 9.6" | 6.3" | +2.0% | |
| 265/50R17 | 27.4" | 10.4" | 5.2" | −2.0% |
Actual speed when the speedometer is calibrated for 275/60R15.
| Speedometer shows | on 295/50R15 | on 275/50R15 | on 255/60R15 |
|---|---|---|---|
| 30 mph | 28.5 mph | 27.7 mph | 29.0 mph |
| 45 mph | 42.8 mph | 41.5 mph | 43.5 mph |
| 60 mph | 57.0 mph | 55.4 mph | 58.0 mph |
| 70 mph | 66.6 mph | 64.6 mph | 67.6 mph |
28.0 inches (711 mm). The sidewall is 6.5 inches.
10.8 inches (275 mm) section width, measured sidewall to sidewall.
About 28.0x10.8R15.
295/50R15 is −4.9% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.8" wider.