245/60R18 tire size
A 245/60R18 tire is 29.6 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
- 29.57″ (751 mm)
- Section width
- 9.65″ (245 mm)
- Sidewall height
- 5.79″ (147 mm)
- Wheel diameter
- 18″
- Circumference
- 92.9″
- Revolutions per mile
- 682
What 245/60R18 means
- 245: the tire is 245 mm (9.6 in) wide from sidewall to sidewall.
- 60: the sidewall is 60% of the width, 147.0 mm (5.79 in) tall.
- R: radial construction, used by almost every modern tire.
- 18: it fits a 18-inch wheel.
Overall diameter = 18 + 2 × 5.79 = 29.57 inches.
Sizes equivalent to 245/60R18
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 245/55R19 | 29.6″ | +0.1% | 60.1 mph actual |
| 225/60R19 | 29.6″ | +0.2% | 60.1 mph actual |
| 225/65R18 | 29.5″ | -0.2% | 59.9 mph actual |
| 245/50R20 | 29.6″ | +0.2% | 60.1 mph actual |
| 265/55R18 | 29.5″ | -0.3% | 59.8 mph actual |
| 265/50R19 | 29.4″ | -0.5% | 59.7 mph actual |
| 225/55R20 | 29.7″ | +0.6% | 60.3 mph actual |
| 265/45R20 | 29.4″ | -0.6% | 59.6 mph actual |
| 235/50R20 | 29.3″ | -1.1% | 59.3 mph actual |
| 235/55R19 | 29.2″ | -1.3% | 59.2 mph actual |
Going a size taller? 235/65R18 is 30.0″ tall, 1.5% more than 245/60R18. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 245/60R18 in inches?
A 245/60R18 tire is about 29.6 inches tall (751 mm) and 9.6 inches wide, on a 18-inch wheel. In flotation sizing that's roughly 29.6x9.6R18.
How tall is a 245/60R18 tire?
The overall diameter is 29.57 inches: the 18-inch wheel plus two 5.79-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
Can I put 255/60R18 instead of 245/60R18?
255/60R18 is 0.47 inches taller (1.6%) and 10 mm wider. That's within the usual 3% limit, but check that your wheel width is approved for it and that it clears the suspension.
How many revolutions per mile does a 245/60R18 make?
About 682 revolutions per mile, from a circumference of 92.9 inches.
