24.0" tall, 6.9" wide, 4.5" sidewall
A 175/65R15 tire is 24.0 inches (609 mm) tall and 6.9 inches wide. The sidewall is 65% of the width, 4.5 inches, on a 15-inch wheel, and the tire turns about 842 times per mile.
In flotation terms that is about 24.0x6.9R15. People often call it a 24-inch tire.
The size most often compared with it is 195/55R15, which is 0.5" shorter (−2.1%). At an indicated 60 mph you would be doing 58.7 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 175/65R15 | |
|---|---|---|---|---|---|
| 195/55R15 | 23.4" | 7.7" | 4.2" | −2.1% |
Sizes within 2% of 24.0" on 16" or 17" or 14" wheels.
| Size | Diameter | Width | Sidewall | vs 175/65R15 | |
|---|---|---|---|---|---|
| 205/50R16 | 24.1" | 8.1" | 4.0" | +0.5% | |
| 235/40R17 | 24.4" | 9.3" | 3.7" | +1.9% | |
| 265/50R14 | 24.4" | 10.4" | 5.2" | +2.0% |
Actual speed when the speedometer is calibrated for 175/65R15.
| Speedometer shows | on 195/55R15 |
|---|---|
| 30 mph | 29.4 mph |
| 45 mph | 44.0 mph |
| 60 mph | 58.7 mph |
| 70 mph | 68.5 mph |
24.0 inches (609 mm). The sidewall is 4.5 inches.
6.9 inches (175 mm) section width, measured sidewall to sidewall.
About 24.0x6.9R15.
195/55R15 is −2.1% in diameter, within the common 3% guideline. It is 0.8" wider.