225/55R15 tire size in inches
A 225/55R15 tire measures
24.7" tall × 8.9" wide
4.87" sidewall on a 15" wheel. 815 revolutions per mile.
225/55R15 means a tire 225 mm wide, with sidewalls 55% as tall as the tire is wide (124 mm), radial construction (R), for a 15 inch wheel.
225/55R15 specs
| Overall diameter (height) | 24.74 inches (629 mm) |
|---|---|
| Section width | 8.86 inches (225 mm) |
| Sidewall height | 4.87 inches (124 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 77.7 inches (1,974 mm) |
| Revolutions per mile | 815 |
| Revolutions per kilometer | 506 |
| Approximate rim width | 6.5" to 8.0" |
| In inches (flotation style) | 24.7x8.9R15 |
| Aspect ratio | 55% |
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 225/55R15 on a 15" wheel
These 15" sizes are within 3% of 225/55R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 165/75R15 | 24.74" | 6.50" | 0.0% | 60.0 mph | Compare |
| 275/45R15 | 24.74" | 10.83" | 0.0% | 60.0 mph | Compare |
| 205/60R15 | 24.69" | 8.07" | −0.2% | 59.9 mph | Compare |
| 175/70R15 | 24.65" | 6.89" | −0.4% | 59.8 mph | Compare |
| 245/50R15 | 24.65" | 9.65" | −0.4% | 59.8 mph | Compare |
| 195/65R15 | 24.98" | 7.68" | +1.0% | 60.6 mph | Compare |
| 185/65R15 | 24.47" | 7.28" | −1.1% | 59.3 mph | Compare |
| 255/50R15 | 25.04" | 10.04" | +1.2% | 60.7 mph | Compare |
| 285/45R15 | 25.10" | 11.22" | +1.4% | 60.9 mph | Compare |
| 265/45R15 | 24.39" | 10.43" | −1.4% | 59.1 mph | Compare |
| 215/60R15 | 25.16" | 8.46" | +1.7% | 61.0 mph | Compare |
| 215/55R15 | 24.31" | 8.46" | −1.8% | 58.9 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 185/60R16 | 16" | 24.74" | 0.0% | Compare |
| 195/70R14 | 14" | 24.75" | 0.0% | Compare |
| 245/35R18 | 18" | 24.75" | 0.0% | Compare |
| 215/40R18 | 18" | 24.77" | +0.1% | Compare |
| 245/40R17 | 17" | 24.72" | −0.1% | Compare |
| 175/85R13 | 13" | 24.71" | −0.1% | Compare |
| 245/30R19 | 19" | 24.79" | +0.2% | Compare |
| 245/45R16 | 16" | 24.68" | −0.3% | Compare |
| 295/25R19 | 19" | 24.81" | +0.3% | Compare |
| 195/50R17 | 17" | 24.68" | −0.3% | Compare |
| 245/25R20 | 20" | 24.82" | +0.3% | Compare |
| 275/40R16 | 16" | 24.66" | −0.3% | Compare |
One size up or down
- 215/55R15narrower: 24.3" × 8.5"
- 235/55R15wider: 25.2" × 9.3"
- 225/50R15lower profile: 23.9" × 8.9"
- 225/60R15taller sidewall: 25.6" × 8.9"
Compare 225/55R15 with another size
Questions
- How tall is a 225/55R15 tire?
- A 225/55R15 tire is 24.7 inches tall (629 mm), calculated from the size. It is 8.9 inches wide with 4.9 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 225/55R15 mean?
- 225/55R15 means a tire 225 mm wide, with sidewalls 55% as tall as the tire is wide (124 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 225/55R15 tire make?
- About 815 revolutions per mile, based on a circumference of 77.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 225/55R15 tire?
- Roughly 6.5" to 8.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 165/75R15 instead of 225/55R15?
- 165/75R15 is 0.00 inches (0.0%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.