32.3" tall, 8.9" wide, 6.6" sidewall
A 225/75R19 tire is 32.3 inches (820 mm) tall and 8.9 inches wide. The sidewall is 75% of the width, 6.6 inches, on a 19-inch wheel, and the tire turns about 625 times per mile.
In flotation terms that is about 32.3x8.9R19. People often call it a 32-inch tire.
The size most often compared with it is 245/70R19, 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 19" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 225/75R19 | |
|---|---|---|---|---|---|
| 245/70R19 | 32.5" | 9.6" | 6.8" | +0.7% | |
| 225/70R19 | 31.4" | 8.9" | 6.2" | −2.7% | |
| 245/75R19 | 33.5" | 9.6" | 7.2" | +3.7% |
Sizes within 2% of 32.3" on 20" or 18" or 17" wheels.
| Size | Diameter | Width | Sidewall | vs 225/75R19 | |
|---|---|---|---|---|---|
| 285/55R20 | 32.3" | 11.2" | 6.2" | +0.2% | |
| 315/50R20 | 32.4" | 12.4" | 6.2" | +0.4% | |
| 305/60R18 | 32.4" | 12.0" | 7.2" | +0.4% | |
| 275/70R17 | 32.2" | 10.8" | 7.6" | −0.4% | |
| 245/80R17 | 32.4" | 9.6" | 7.7" | +0.5% | |
| 245/75R18 | 32.5" | 9.6" | 7.2" | +0.6% |
Actual speed when the speedometer is calibrated for 225/75R19.
| Speedometer shows | on 245/70R19 | on 225/70R19 | on 245/75R19 |
|---|---|---|---|
| 30 mph | 30.2 mph | 29.2 mph | 31.1 mph |
| 45 mph | 45.3 mph | 43.8 mph | 46.6 mph |
| 60 mph | 60.4 mph | 58.4 mph | 62.2 mph |
| 70 mph | 70.5 mph | 68.1 mph | 72.6 mph |
32.3 inches (820 mm). The sidewall is 6.6 inches.
8.9 inches (225 mm) section width, measured sidewall to sidewall.
About 32.3x8.9R19.
245/70R19 is +0.7% in diameter, within the common 3% guideline. It is 0.8" wider.