225/45R17 tire size
A 225/45R17 tire is 25.0 inches tall and 8.9 inches wide. Here are its full dimensions, what the numbers mean, and the sizes you can swap it for.
- Overall diameter
- 24.97″ (634 mm)
- Section width
- 8.86″ (225 mm)
- Sidewall height
- 3.99″ (101 mm)
- Wheel diameter
- 17″
- Circumference
- 78.5″
- Revolutions per mile
- 808
What 225/45R17 means
- 225: the tire is 225 mm (8.9 in) wide from sidewall to sidewall.
- 45: the sidewall is 45% of the width, 101.3 mm (3.99 in) tall.
- R: radial construction, used by almost every modern tire.
- 17: it fits a 17-inch wheel.
Overall diameter = 17 + 2 × 3.99 = 24.97 inches.
Sizes equivalent to 225/45R17
These sizes are within 3% of the overall diameter, the usual limit for swapping without speedometer problems.
| Size | Diameter | Difference | Speedometer at 60 mph |
|---|---|---|---|
| 215/35R19 | 24.9″ | -0.2% | 59.9 mph actual |
| 205/50R17 | 25.1″ | +0.4% | 60.2 mph actual |
| 225/40R18 | 25.1″ | +0.5% | 60.3 mph actual |
| 215/40R18 | 24.8″ | -0.8% | 59.5 mph actual |
| 245/35R18 | 24.8″ | -0.9% | 59.5 mph actual |
| 225/35R19 | 25.2″ | +0.9% | 60.5 mph actual |
| 245/40R17 | 24.7″ | -1.0% | 59.4 mph actual |
| 205/45R18 | 25.3″ | +1.2% | 60.7 mph actual |
| 205/35R19 | 24.6″ | -1.3% | 59.2 mph actual |
| 215/45R17 | 24.6″ | -1.4% | 59.1 mph actual |
Going a size taller? 205/50R17 is 25.1″ tall, 0.4% more than 225/45R17. Compare any two sizes in the tire size calculator.
See every common size side by side in the tire size chart.
Questions
What is 225/45R17 in inches?
A 225/45R17 tire is about 25.0 inches tall (634 mm) and 8.9 inches wide, on a 17-inch wheel. In flotation sizing that's roughly 25.0x8.9R17.
How tall is a 225/45R17 tire?
The overall diameter is 24.97 inches: the 17-inch wheel plus two 3.99-inch sidewalls. Actual tires vary by a few tenths of an inch between brands and models.
Can I put 235/45R17 instead of 225/45R17?
235/45R17 is 0.35 inches taller (1.4%) 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 225/45R17 make?
About 808 revolutions per mile, from a circumference of 78.5 inches.
