245/70R17 tire size
A 245/70R17 tire is 30.5 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
- 30.50″ (775 mm)
- Section width
- 9.65″ (245 mm)
- Sidewall height
- 6.75″ (172 mm)
- Wheel diameter
- 17″
- Circumference
- 95.8″
- Revolutions per mile
- 661
What 245/70R17 means
- 245: the tire is 245 mm (9.6 in) wide from sidewall to sidewall.
- 70: the sidewall is 70% of the width, 171.5 mm (6.75 in) tall.
- R: radial construction, used by almost every modern tire.
- 17: it fits a 17-inch wheel.
Overall diameter = 17 + 2 × 6.75 = 30.50 inches.
Sizes equivalent to 245/70R17
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 225/65R19 | 30.5″ | +0.0% | 60.0 mph actual |
| 265/60R18 | 30.5″ | +0.1% | 60.0 mph actual |
| 265/55R19 | 30.5″ | -0.1% | 59.9 mph actual |
| 245/65R18 | 30.5″ | +0.1% | 60.1 mph actual |
| 265/65R17 | 30.6″ | +0.2% | 60.1 mph actual |
| 245/60R19 | 30.6″ | +0.2% | 60.1 mph actual |
| 225/70R18 | 30.4″ | -0.3% | 59.8 mph actual |
| 225/75R17 | 30.3″ | -0.7% | 59.6 mph actual |
| 235/75R17 | 30.9″ | +1.2% | 60.7 mph actual |
| 235/60R19 | 30.1″ | -1.3% | 59.2 mph actual |
Going a size taller? 265/65R17 is 30.6″ tall, 0.2% more than 245/70R17. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 245/70R17 in inches?
A 245/70R17 tire is about 30.5 inches tall (775 mm) and 9.6 inches wide, on a 17-inch wheel. In flotation sizing that's roughly 30.5x9.6R17.
How tall is a 245/70R17 tire?
The overall diameter is 30.50 inches: the 17-inch wheel plus two 6.75-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
How many revolutions per mile does a 245/70R17 make?
About 661 revolutions per mile, from a circumference of 95.8 inches.
