225/25R20 tire size in inches
A 225/25R20 tire measures
24.4" tall × 8.9" wide
2.21" sidewall on a 20" wheel. 826 revolutions per mile.
225/25R20 means a tire 225 mm wide, with sidewalls 25% as tall as the tire is wide (56 mm), radial construction (R), for a 20 inch wheel.
225/25R20 specs
| Overall diameter (height) | 24.43 inches (621 mm) |
|---|---|
| Section width | 8.86 inches (225 mm) |
| Sidewall height | 2.21 inches (56 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 76.7 inches (1,949 mm) |
| Revolutions per mile | 826 |
| Revolutions per kilometer | 513 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 24.4x8.9R20 |
| Aspect ratio | 25% |
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 225/25R20 on a 20" wheel
These 20" sizes are within 3% of 225/25R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 235/25R20 | 24.63" | 9.25" | +0.8% | 60.5 mph | Compare |
| 215/25R20 | 24.23" | 8.46" | −0.8% | 59.5 mph | Compare |
| 245/25R20 | 24.82" | 9.65" | +1.6% | 61.0 mph | Compare |
| 255/25R20 | 25.02" | 10.04" | +2.4% | 61.5 mph | Compare |
| 215/30R20 | 25.08" | 8.46" | +2.7% | 61.6 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 195/55R16 | 16" | 24.44" | +0.1% | Compare |
| 275/25R19 | 19" | 24.41" | −0.1% | Compare |
| 205/40R18 | 18" | 24.46" | +0.1% | Compare |
| 235/40R17 | 17" | 24.40" | −0.1% | Compare |
| 165/80R14 | 14" | 24.39" | −0.1% | Compare |
| 215/50R16 | 16" | 24.46" | +0.1% | Compare |
| 185/65R15 | 15" | 24.47" | +0.2% | Compare |
| 265/45R15 | 15" | 24.39" | −0.2% | Compare |
| 235/35R18 | 18" | 24.48" | +0.2% | Compare |
| 155/85R14 | 14" | 24.37" | −0.2% | Compare |
| 205/65R14 | 14" | 24.49" | +0.3% | Compare |
| 265/40R16 | 16" | 24.35" | −0.3% | Compare |
One size up or down
Compare 225/25R20 with another size
Questions
- How tall is a 225/25R20 tire?
- A 225/25R20 tire is 24.4 inches tall (621 mm), calculated from the size. It is 8.9 inches wide with 2.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 225/25R20 mean?
- 225/25R20 means a tire 225 mm wide, with sidewalls 25% as tall as the tire is wide (56 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 225/25R20 tire make?
- About 826 revolutions per mile, based on a circumference of 76.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 225/25R20 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 235/25R20 instead of 225/25R20?
- 235/25R20 is +0.20 inches (+0.8%) in overall diameter, so at an indicated 60 mph you would be doing 60.5 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.