245/40R19 tire size
A 245/40R19 tire is 26.7 inches tall and 9.6 inches wide. Here are its full dimensions, what the numbers mean, and the sizes you can swap it for.
- Overall diameter
- 26.72″ (679 mm)
- Section width
- 9.65″ (245 mm)
- Sidewall height
- 3.86″ (98 mm)
- Wheel diameter
- 19″
- Circumference
- 83.9″
- Revolutions per mile
- 755
What 245/40R19 means
- 245: the tire is 245 mm (9.6 in) wide from sidewall to sidewall.
- 40: the sidewall is 40% of the width, 98.0 mm (3.86 in) tall.
- R: radial construction, used by almost every modern tire.
- 19: it fits a 19-inch wheel.
Overall diameter = 19 + 2 × 3.86 = 26.72 inches.
Sizes equivalent to 245/40R19
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 245/35R20 | 26.8″ | +0.1% | 60.1 mph actual |
| 245/30R21 | 26.8″ | +0.3% | 60.2 mph actual |
| 235/30R21 | 26.6″ | -0.6% | 59.6 mph actual |
| 235/35R20 | 26.5″ | -0.9% | 59.5 mph actual |
| 225/45R19 | 27.0″ | +1.0% | 60.6 mph actual |
| 255/30R21 | 27.0″ | +1.1% | 60.7 mph actual |
| 255/35R20 | 27.0″ | +1.2% | 60.7 mph actual |
| 235/40R19 | 26.4″ | -1.2% | 59.3 mph actual |
| 255/40R19 | 27.0″ | +1.2% | 60.7 mph actual |
| 225/40R20 | 27.1″ | +1.4% | 60.8 mph actual |
Going a size taller? 245/45R19 is 27.7″ tall, 3.6% more than 245/40R19. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 245/40R19 in inches?
A 245/40R19 tire is about 26.7 inches tall (679 mm) and 9.6 inches wide, on a 19-inch wheel. In flotation sizing that's roughly 26.7x9.6R19.
How tall is a 245/40R19 tire?
The overall diameter is 26.72 inches: the 19-inch wheel plus two 3.86-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
How many revolutions per mile does a 245/40R19 make?
About 755 revolutions per mile, from a circumference of 83.9 inches.
