225/45R15 tire size in inches
A 225/45R15 tire measures
23.0" tall × 8.9" wide
3.99" sidewall on a 15" wheel. 878 revolutions per mile.
225/45R15 means a tire 225 mm wide, with sidewalls 45% as tall as the tire is wide (101 mm), radial construction (R), for a 15 inch wheel.
225/45R15 specs
| Overall diameter (height) | 22.97 inches (584 mm) |
|---|---|
| Section width | 8.86 inches (225 mm) |
| Sidewall height | 3.99 inches (101 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 72.2 inches (1,833 mm) |
| Revolutions per mile | 878 |
| Revolutions per kilometer | 546 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 23.0x8.9R15 |
| Aspect ratio | 45% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 225/45R15 on a 15" wheel
These 15" sizes are within 3% of 225/45R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 185/55R15 | 23.01" | 7.28" | +0.2% | 60.1 mph | Compare |
| 205/50R15 | 23.07" | 8.07" | +0.4% | 60.3 mph | Compare |
| 165/60R15 | 22.80" | 6.50" | −0.8% | 59.5 mph | Compare |
| 195/50R15 | 22.68" | 7.68" | −1.3% | 59.2 mph | Compare |
| 175/60R15 | 23.27" | 6.89" | +1.3% | 60.8 mph | Compare |
| 215/45R15 | 22.62" | 8.46" | −1.5% | 59.1 mph | Compare |
| 235/45R15 | 23.33" | 9.25" | +1.5% | 60.9 mph | Compare |
| 175/55R15 | 22.58" | 6.89" | −1.7% | 59.0 mph | Compare |
| 165/65R15 | 23.44" | 6.50" | +2.1% | 61.2 mph | Compare |
| 195/55R15 | 23.44" | 7.68" | +2.1% | 61.2 mph | Compare |
| 215/50R15 | 23.46" | 8.46" | +2.1% | 61.3 mph | Compare |
| 185/50R15 | 22.28" | 7.28" | −3.0% | 58.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 195/65R13 | 13" | 22.98" | 0.0% | Compare |
| 175/65R14 | 14" | 22.96" | −0.1% | Compare |
| 215/35R17 | 17" | 22.93" | −0.2% | Compare |
| 195/45R16 | 16" | 22.91" | −0.3% | Compare |
| 205/25R19 | 19" | 23.04" | +0.3% | Compare |
| 205/55R14 | 14" | 22.88" | −0.4% | Compare |
| 225/40R16 | 16" | 23.09" | +0.5% | Compare |
| 165/70R14 | 14" | 23.09" | +0.5% | Compare |
| 185/40R17 | 17" | 22.83" | −0.6% | Compare |
| 195/40R17 | 17" | 23.14" | +0.7% | Compare |
| 155/75R14 | 14" | 23.15" | +0.8% | Compare |
| 215/60R13 | 13" | 23.16" | +0.8% | Compare |
One size up or down
Compare 225/45R15 with another size
Questions
- How tall is a 225/45R15 tire?
- A 225/45R15 tire is 23.0 inches tall (584 mm), calculated from the size. It is 8.9 inches wide with 4.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 225/45R15 mean?
- 225/45R15 means a tire 225 mm wide, with sidewalls 45% as tall as the tire is wide (101 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 225/45R15 tire make?
- About 878 revolutions per mile, based on a circumference of 72.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 225/45R15 tire?
- Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 185/55R15 instead of 225/45R15?
- 185/55R15 is +0.04 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.