27.5" tall, 8.1" wide, 5.2" sidewall
A 205/65R17 tire is 27.5 inches (698 mm) tall and 8.1 inches wide. The sidewall is 65% of the width, 5.2 inches, on a 17-inch wheel, and the tire turns about 734 times per mile.
In flotation terms that is about 27.5x8.1R17. People often call it a 27-inch tire.
The size most often compared with it is 205/60R17, which is 0.8" shorter (−2.9%). At an indicated 60 mph you would be doing 58.2 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 205/65R17 | |
|---|---|---|---|---|---|
| 205/60R17 | 26.7" | 8.1" | 4.8" | −2.9% | |
| 225/70R17 | 29.4" | 8.9" | 6.2" | +6.9% | |
| 185/55R17 | 25.0" | 7.3" | 4.0" | −9.0% | |
| 225/75R17 | 30.3" | 8.9" | 6.6" | +10.2% |
Sizes within 2% of 27.5" on 15" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 205/65R17 | |
|---|---|---|---|---|---|
| 225/70R15 | 27.4" | 8.9" | 6.2" | −0.3% | |
| 315/50R15 | 27.4" | 12.4" | 6.2" | −0.3% | |
| 295/40R18 | 27.3" | 11.6" | 4.6" | −0.7% | |
| 215/75R15 | 27.7" | 8.5" | 6.3" | +0.7% | |
| 195/80R15 | 27.3" | 7.7" | 6.1" | −0.8% | |
| 275/45R18 | 27.7" | 10.8" | 4.9" | +0.9% |
Actual speed when the speedometer is calibrated for 205/65R17.
| Speedometer shows | on 205/60R17 | on 225/70R17 | on 185/55R17 |
|---|---|---|---|
| 30 mph | 29.1 mph | 32.1 mph | 27.3 mph |
| 45 mph | 43.7 mph | 48.1 mph | 40.9 mph |
| 60 mph | 58.2 mph | 64.2 mph | 54.6 mph |
| 70 mph | 67.9 mph | 74.9 mph | 63.7 mph |
27.5 inches (698 mm). The sidewall is 5.2 inches.
8.1 inches (205 mm) section width, measured sidewall to sidewall.
About 27.5x8.1R17.
205/60R17 is −2.9% in diameter, within the common 3% guideline. It is 0.0" wider.