285/70R17 tire size
A 285/70R17 tire is 32.7 inches tall and 11.2 inches wide. Here are its full dimensions, what the numbers mean, and the sizes you can swap it for.
- Overall diameter
- 32.71″ (831 mm)
- Section width
- 11.22″ (285 mm)
- Sidewall height
- 7.85″ (200 mm)
- Wheel diameter
- 17″
- Circumference
- 102.8″
- Revolutions per mile
- 617
What 285/70R17 means
- 285: the tire is 285 mm (11.2 in) wide from sidewall to sidewall.
- 70: the sidewall is 70% of the width, 199.5 mm (7.85 in) tall.
- R: radial construction, used by almost every modern tire.
- 17: it fits a 17-inch wheel.
Overall diameter = 17 + 2 × 7.85 = 32.71 inches.
Sizes equivalent to 285/70R17
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 265/75R17 | 32.6″ | -0.2% | 59.9 mph actual |
| 305/65R17 | 32.6″ | -0.3% | 59.8 mph actual |
| 265/70R18 | 32.6″ | -0.3% | 59.8 mph actual |
| 285/65R18 | 32.6″ | -0.4% | 59.8 mph actual |
| 265/65R19 | 32.6″ | -0.4% | 59.7 mph actual |
| 295/60R19 | 32.9″ | +0.7% | 60.4 mph actual |
| 285/60R19 | 32.5″ | -0.7% | 59.6 mph actual |
| 305/60R18 | 32.4″ | -0.9% | 59.5 mph actual |
| 275/65R19 | 33.1″ | +1.1% | 60.7 mph actual |
| 295/65R18 | 33.1″ | +1.2% | 60.7 mph actual |
Going a size taller? 315/70R17 is 34.4″ tall, 5.1% more than 285/70R17. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 285/70R17 in inches?
A 285/70R17 tire is about 32.7 inches tall (831 mm) and 11.2 inches wide, on a 17-inch wheel. In flotation sizing that's roughly 32.7x11.2R17.
How tall is a 285/70R17 tire?
The overall diameter is 32.71 inches: the 17-inch wheel plus two 7.85-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
How many revolutions per mile does a 285/70R17 make?
About 617 revolutions per mile, from a circumference of 102.8 inches.
