215/30R20 tire size in inches
A 215/30R20 tire measures
25.1" tall × 8.5" wide
2.54" sidewall on a 20" wheel. 804 revolutions per mile.
215/30R20 means a tire 215 mm wide, with sidewalls 30% as tall as the tire is wide (65 mm), radial construction (R), for a 20 inch wheel.
215/30R20 specs
| Overall diameter (height) | 25.08 inches (637 mm) |
|---|---|
| Section width | 8.46 inches (215 mm) |
| Sidewall height | 2.54 inches (65 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 78.8 inches (2,001 mm) |
| Revolutions per mile | 804 |
| Revolutions per kilometer | 500 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 25.1x8.5R20 |
| Aspect ratio | 30% |
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 215/30R20 on a 20" wheel
These 20" sizes are within 3% of 215/30R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/25R20 | 25.02" | 10.04" | −0.2% | 59.9 mph | Compare |
| 265/25R20 | 25.22" | 10.43" | +0.5% | 60.3 mph | Compare |
| 225/30R20 | 25.31" | 8.86" | +0.9% | 60.6 mph | Compare |
| 245/25R20 | 24.82" | 9.65" | −1.0% | 59.4 mph | Compare |
| 275/25R20 | 25.41" | 10.83" | +1.3% | 60.8 mph | Compare |
| 235/25R20 | 24.63" | 9.25" | −1.8% | 58.9 mph | Compare |
| 235/30R20 | 25.55" | 9.25" | +1.9% | 61.1 mph | Compare |
| 285/25R20 | 25.61" | 11.22" | +2.1% | 61.3 mph | Compare |
| 225/25R20 | 24.43" | 8.86" | −2.6% | 58.4 mph | Compare |
| 245/30R20 | 25.79" | 9.65" | +2.8% | 61.7 mph | Compare |
| 295/25R20 | 25.81" | 11.61" | +2.9% | 61.7 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 205/50R17 | 17" | 25.07" | 0.0% | Compare |
| 225/40R18 | 18" | 25.09" | 0.0% | Compare |
| 285/45R15 | 15" | 25.10" | +0.1% | Compare |
| 235/60R14 | 14" | 25.10" | +0.1% | Compare |
| 205/75R13 | 13" | 25.11" | +0.1% | Compare |
| 165/85R14 | 14" | 25.04" | −0.1% | Compare |
| 255/55R14 | 14" | 25.04" | −0.1% | Compare |
| 255/50R15 | 15" | 25.04" | −0.2% | Compare |
| 255/45R16 | 16" | 25.04" | −0.2% | Compare |
| 255/40R17 | 17" | 25.03" | −0.2% | Compare |
| 235/65R13 | 13" | 25.03" | −0.2% | Compare |
| 255/35R18 | 18" | 25.03" | −0.2% | Compare |
One size up or down
- 225/30R20wider: 25.3" × 8.9"
- 215/25R20lower profile: 24.2" × 8.5"
- 215/35R20taller sidewall: 25.9" × 8.5"
Compare 215/30R20 with another size
Questions
- How tall is a 215/30R20 tire?
- A 215/30R20 tire is 25.1 inches tall (637 mm), calculated from the size. It is 8.5 inches wide with 2.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 215/30R20 mean?
- 215/30R20 means a tire 215 mm wide, with sidewalls 30% as tall as the tire is wide (65 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 215/30R20 tire make?
- About 804 revolutions per mile, based on a circumference of 78.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 215/30R20 tire?
- Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/25R20 instead of 215/30R20?
- 255/25R20 is −0.06 inches (−0.2%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.