32.4" tall, 9.6" wide, 7.7" sidewall
A 245/80R17 tire is 32.4 inches (824 mm) tall and 9.6 inches wide. The sidewall is 80% of the width, 7.7 inches, on a 17-inch wheel, and the tire turns about 622 times per mile.
In flotation terms that is about 32.4x9.6R17, closest to the common 33x12.50R17 (33.0"). People often call it a 32-inch tire.
The size most often compared with it is 265/75R17, which is 0.2" taller (+0.7%). At an indicated 60 mph you would be doing 60.4 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 245/80R17 | |
|---|---|---|---|---|---|
| 265/75R17 | 32.6" | 10.4" | 7.8" | +0.7% | |
| 235/85R17 | 32.7" | 9.3" | 7.9" | +0.9% | |
| 255/75R17 | 32.1" | 10.0" | 7.5" | −1.2% | |
| 235/80R17 | 31.8" | 9.3" | 7.4" | −1.9% | |
| 255/80R17 | 33.1" | 10.0" | 8.0" | +1.9% | |
| 265/70R17 | 31.6" | 10.4" | 7.3" | −2.5% | |
| 245/75R17 | 31.5" | 9.6" | 7.2" | −3.0% | |
| 245/85R17 | 33.4" | 9.6" | 8.2" | +3.0% | |
| 225/80R17 | 31.2" | 8.9" | 7.1" | −3.9% | |
| 265/80R17 | 33.7" | 10.4" | 8.3" | +3.9% |
Sizes within 2% of 32.4" on 15" or 18" or 16" or 19" wheels.
| Size | Diameter | Width | Sidewall | vs 245/80R17 | |
|---|---|---|---|---|---|
| 295/75R15 | 32.4" | 11.6" | 8.7" | −0.0% | |
| 305/60R18 | 32.4" | 12.0" | 7.2" | −0.1% | |
| 245/85R16 | 32.4" | 9.6" | 8.2" | −0.1% | |
| 245/75R18 | 32.5" | 9.6" | 7.2" | +0.1% | |
| 245/70R19 | 32.5" | 9.6" | 6.8" | +0.2% | |
| 315/70R15 | 32.4" | 12.4" | 8.7" | −0.2% |
Actual speed when the speedometer is calibrated for 245/80R17.
| Speedometer shows | on 265/75R17 | on 235/85R17 | on 255/75R17 |
|---|---|---|---|
| 30 mph | 30.2 mph | 30.3 mph | 29.7 mph |
| 45 mph | 45.3 mph | 45.4 mph | 44.5 mph |
| 60 mph | 60.4 mph | 60.5 mph | 59.3 mph |
| 70 mph | 70.5 mph | 70.6 mph | 69.2 mph |
32.4 inches (824 mm). The sidewall is 7.7 inches.
9.6 inches (245 mm) section width, measured sidewall to sidewall.
About 32.4x9.6R17; the closest common flotation size is 33x12.50R17 at 33.0".
265/75R17 is +0.7% in diameter, within the common 3% guideline. It is 0.8" wider.