235/45R17 tire size
A 235/45R17 tire is 25.3 inches tall and 9.3 inches wide. Here are its full dimensions, what the numbers mean, and the sizes you can swap it for.
- Overall diameter
- 25.33″ (643 mm)
- Section width
- 9.25″ (235 mm)
- Sidewall height
- 4.16″ (106 mm)
- Wheel diameter
- 17″
- Circumference
- 79.6″
- Revolutions per mile
- 796
What 235/45R17 means
- 235: the tire is 235 mm (9.3 in) wide from sidewall to sidewall.
- 45: the sidewall is 45% of the width, 105.8 mm (4.16 in) tall.
- R: radial construction, used by almost every modern tire.
- 17: it fits a 17-inch wheel.
Overall diameter = 17 + 2 × 4.16 = 25.33 inches.
Sizes equivalent to 235/45R17
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 235/40R18 | 25.4″ | +0.3% | 60.2 mph actual |
| 225/35R19 | 25.2″ | -0.5% | 59.7 mph actual |
| 215/50R17 | 25.5″ | +0.5% | 60.3 mph actual |
| 235/35R19 | 25.5″ | +0.6% | 60.4 mph actual |
| 225/40R18 | 25.1″ | -0.9% | 59.4 mph actual |
| 215/45R18 | 25.6″ | +1.2% | 60.7 mph actual |
| 255/40R17 | 25.0″ | -1.2% | 59.3 mph actual |
| 255/35R18 | 25.0″ | -1.2% | 59.3 mph actual |
| 225/45R17 | 25.0″ | -1.4% | 59.2 mph actual |
| 245/45R17 | 25.7″ | +1.4% | 60.8 mph actual |
Going a size taller? 215/50R17 is 25.5″ tall, 0.5% more than 235/45R17. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 235/45R17 in inches?
A 235/45R17 tire is about 25.3 inches tall (643 mm) and 9.3 inches wide, on a 17-inch wheel. In flotation sizing that's roughly 25.3x9.3R17.
How tall is a 235/45R17 tire?
The overall diameter is 25.33 inches: the 17-inch wheel plus two 4.16-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
How many revolutions per mile does a 235/45R17 make?
About 796 revolutions per mile, from a circumference of 79.6 inches.
