33.1" tall, 10.0" wide, 7.0" sidewall
A 255/70R19 tire is 33.1 inches (840 mm) tall and 10.0 inches wide. The sidewall is 70% of the width, 7.0 inches, on a 19-inch wheel, and the tire turns about 610 times per mile.
In flotation terms that is about 33.1x10.0R19. People often call it a 33-inch tire.
The size most often compared with it is 245/75R19, which is 0.4" taller (+1.3%). At an indicated 60 mph you would be doing 60.8 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 255/70R19 | |
|---|---|---|---|---|---|
| 245/75R19 | 33.5" | 9.6" | 7.2" | +1.3% | |
| 265/70R19 | 33.6" | 10.4" | 7.3" | +1.7% | |
| 245/70R19 | 32.5" | 9.6" | 6.8" | −1.7% |
Sizes within 2% of 33.1" on 20" or 18" or 17" wheels.
| Size | Diameter | Width | Sidewall | vs 255/70R19 | |
|---|---|---|---|---|---|
| 255/65R20 | 33.1" | 10.0" | 6.5" | −0.0% | |
| 255/75R18 | 33.1" | 10.0" | 7.5" | +0.0% | |
| 255/80R17 | 33.1" | 10.0" | 8.0" | +0.0% | |
| 295/65R18 | 33.1" | 11.6" | 7.5" | +0.1% | |
| 33x12.50R17 | 33.0" | 12.5" | 8.0" | −0.2% | |
| 33x12.50R18 | 33.0" | 12.5" | 7.5" | −0.2% |
Actual speed when the speedometer is calibrated for 255/70R19.
| Speedometer shows | on 245/75R19 | on 265/70R19 | on 245/70R19 |
|---|---|---|---|
| 30 mph | 30.4 mph | 30.5 mph | 29.5 mph |
| 45 mph | 45.6 mph | 45.8 mph | 44.2 mph |
| 60 mph | 60.8 mph | 61.0 mph | 59.0 mph |
| 70 mph | 70.9 mph | 71.2 mph | 68.8 mph |
33.1 inches (840 mm). The sidewall is 7.0 inches.
10.0 inches (255 mm) section width, measured sidewall to sidewall.
About 33.1x10.0R19.
245/75R19 is +1.3% in diameter, within the common 3% guideline. It is 0.4" narrower.