265/65R18 tire size
A 265/65R18 tire is 31.6 inches tall and 10.4 inches wide. Here are its full dimensions, what the numbers mean, and the sizes you can swap it for.
- Overall diameter
- 31.56″ (802 mm)
- Section width
- 10.43″ (265 mm)
- Sidewall height
- 6.78″ (172 mm)
- Wheel diameter
- 18″
- Circumference
- 99.2″
- Revolutions per mile
- 639
What 265/65R18 means
- 265: the tire is 265 mm (10.4 in) wide from sidewall to sidewall.
- 65: the sidewall is 65% of the width, 172.3 mm (6.78 in) tall.
- R: radial construction, used by almost every modern tire.
- 18: it fits a 18-inch wheel.
Overall diameter = 18 + 2 × 6.78 = 31.56 inches.
Sizes equivalent to 265/65R18
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 245/60R20 | 31.6″ | +0.0% | 60.0 mph actual |
| 245/65R19 | 31.5″ | -0.1% | 60.0 mph actual |
| 265/60R19 | 31.5″ | -0.1% | 59.9 mph actual |
| 245/70R18 | 31.5″ | -0.2% | 59.9 mph actual |
| 265/55R20 | 31.5″ | -0.3% | 59.8 mph actual |
| 285/60R18 | 31.5″ | -0.3% | 59.8 mph actual |
| 285/55R19 | 31.3″ | -0.7% | 59.6 mph actual |
| 285/50R20 | 31.2″ | -1.1% | 59.3 mph actual |
| 275/55R20 | 31.9″ | +1.1% | 60.7 mph actual |
| 275/60R19 | 32.0″ | +1.4% | 60.8 mph actual |
Going a size taller? 275/65R18 is 32.1″ tall, 1.6% more than 265/65R18. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 265/65R18 in inches?
A 265/65R18 tire is about 31.6 inches tall (802 mm) and 10.4 inches wide, on a 18-inch wheel. In flotation sizing that's roughly 31.6x10.4R18.
How tall is a 265/65R18 tire?
The overall diameter is 31.56 inches: the 18-inch wheel plus two 6.78-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
Can I put 275/65R18 instead of 265/65R18?
275/65R18 is 0.51 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 265/65R18 make?
About 639 revolutions per mile, from a circumference of 99.2 inches.
