27.3" tall, 7.7" wide, 6.1" sidewall
A 195/80R15 tire is 27.3 inches (693 mm) tall and 7.7 inches wide. The sidewall is 80% of the width, 6.1 inches, on a 15-inch wheel, and the tire turns about 739 times per mile.
In flotation terms that is about 27.3x7.7R15. People often call it a 27-inch tire.
The size most often compared with it is 215/75R15, which is 0.4" taller (+1.5%). At an indicated 60 mph you would be doing 60.9 mph on it.
| 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 195/80R15 | |
|---|---|---|---|---|---|
| 215/75R15 | 27.7" | 8.5" | 6.3" | +1.5% | compare |
| 215/70R15 | 26.9" | 8.5" | 5.9" | −1.6% | |
| 205/70R15 | 26.3" | 8.1" | 5.6" | −3.6% | compare |
| 215/80R15 | 28.5" | 8.5" | 6.8" | +4.6% |
Sizes within 2% of 27.3" on 17" or 14" wheels.
| Size | Diameter | Width | Sidewall | vs 195/80R15 | |
|---|---|---|---|---|---|
| 265/50R17 | 27.4" | 10.4" | 5.2" | +0.5% | |
| 285/45R17 | 27.1" | 11.2" | 5.0" | −0.7% | |
| 205/65R17 | 27.5" | 8.1" | 5.2" | +0.8% | |
| 255/65R14 | 27.1" | 10.0" | 6.5" | −0.9% | |
| 245/55R17 | 27.6" | 9.6" | 5.3" | +1.2% | |
| 275/50R17 | 27.8" | 10.8" | 5.4" | +2.0% |
Actual speed when the speedometer is calibrated for 195/80R15.
| Speedometer shows | on 215/75R15 | on 205/70R15 | on 215/70R15 |
|---|---|---|---|
| 30 mph | 30.5 mph | 28.9 mph | 29.5 mph |
| 45 mph | 45.7 mph | 43.4 mph | 44.3 mph |
| 60 mph | 60.9 mph | 57.8 mph | 59.0 mph |
| 70 mph | 71.1 mph | 67.5 mph | 68.9 mph |
27.3 inches (693 mm). The sidewall is 6.1 inches.
7.7 inches (195 mm) section width, measured sidewall to sidewall.
About 27.3x7.7R15.
215/75R15 is +1.5% in diameter, within the common 3% guideline. It is 0.8" wider.