31.4" tall, 8.9" wide, 6.2" sidewall
A 225/70R19 tire is 31.4 inches (798 mm) tall and 8.9 inches wide. The sidewall is 70% of the width, 6.2 inches, on a 19-inch wheel, and the tire turns about 642 times per mile.
In flotation terms that is about 31.4x8.9R19. People often call it a 31-inch tire.
The size most often compared with it is 225/75R19, which is 0.9" taller (+2.8%). At an indicated 60 mph you would be doing 61.7 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 225/70R19 | |
|---|---|---|---|---|---|
| 225/75R19 | 32.3" | 8.9" | 6.6" | +2.8% | |
| 245/70R19 | 32.5" | 9.6" | 6.8" | +3.5% | |
| 245/75R19 | 33.5" | 9.6" | 7.2" | +6.6% |
Sizes within 2% of 31.4" on 17" or 18" or 20" wheels.
| Size | Diameter | Width | Sidewall | vs 225/70R19 | |
|---|---|---|---|---|---|
| 305/60R17 | 31.4" | 12.0" | 7.2" | +0.0% | |
| 285/60R18 | 31.5" | 11.2" | 6.7" | +0.2% | |
| 245/75R17 | 31.5" | 9.6" | 7.2" | +0.2% | |
| 265/55R20 | 31.5" | 10.4" | 5.7" | +0.2% | |
| 245/70R18 | 31.5" | 9.6" | 6.8" | +0.3% | |
| 265/65R18 | 31.6" | 10.4" | 6.8" | +0.5% |
Actual speed when the speedometer is calibrated for 225/70R19.
| Speedometer shows | on 225/75R19 | on 245/70R19 | on 245/75R19 |
|---|---|---|---|
| 30 mph | 30.8 mph | 31.1 mph | 32.0 mph |
| 45 mph | 46.3 mph | 46.6 mph | 48.0 mph |
| 60 mph | 61.7 mph | 62.1 mph | 63.9 mph |
| 70 mph | 72.0 mph | 72.5 mph | 74.6 mph |
31.4 inches (798 mm). The sidewall is 6.2 inches.
8.9 inches (225 mm) section width, measured sidewall to sidewall.
About 31.4x8.9R19.
225/75R19 is +2.8% in diameter, within the common 3% guideline. It is 0.0" wider.