215/45R20 tire size in inches
A 215/45R20 tire measures
27.6" tall × 8.5" wide
3.81" sidewall on a 20" wheel. 730 revolutions per mile.
215/45R20 means a tire 215 mm wide, with sidewalls 45% as tall as the tire is wide (97 mm), radial construction (R), for a 20 inch wheel.
215/45R20 specs
| Overall diameter (height) | 27.62 inches (702 mm) |
|---|---|
| Section width | 8.46 inches (215 mm) |
| Sidewall height | 3.81 inches (97 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 86.8 inches (2,204 mm) |
| Revolutions per mile | 730 |
| Revolutions per kilometer | 454 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 27.6x8.5R20 |
| 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 215/45R20 on a 20" wheel
These 20" sizes are within 3% of 215/45R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/35R20 | 27.58" | 10.83" | −0.1% | 59.9 mph | Compare |
| 325/30R20 | 27.68" | 12.80" | +0.2% | 60.1 mph | Compare |
| 245/40R20 | 27.72" | 9.65" | +0.4% | 60.2 mph | Compare |
| 315/30R20 | 27.44" | 12.40" | −0.6% | 59.6 mph | Compare |
| 235/40R20 | 27.40" | 9.25" | −0.8% | 59.5 mph | Compare |
| 285/35R20 | 27.85" | 11.22" | +0.9% | 60.5 mph | Compare |
| 335/30R20 | 27.91" | 13.19" | +1.1% | 60.6 mph | Compare |
| 265/35R20 | 27.30" | 10.43" | −1.1% | 59.3 mph | Compare |
| 225/45R20 | 27.97" | 8.86" | +1.3% | 60.8 mph | Compare |
| 255/40R20 | 28.03" | 10.04" | +1.5% | 60.9 mph | Compare |
| 305/30R20 | 27.20" | 12.01" | −1.5% | 59.1 mph | Compare |
| 295/35R20 | 28.13" | 11.61" | +1.9% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 295/50R16 | 16" | 27.61" | 0.0% | Compare |
| 245/55R17 | 17" | 27.61" | 0.0% | Compare |
| 285/25R22 | 22" | 27.61" | 0.0% | Compare |
| 225/60R17 | 17" | 27.63" | 0.0% | Compare |
| 305/40R18 | 18" | 27.61" | 0.0% | Compare |
| 335/25R21 | 21" | 27.59" | −0.1% | Compare |
| 245/50R18 | 18" | 27.65" | +0.1% | Compare |
| 185/80R16 | 16" | 27.65" | +0.1% | Compare |
| 275/40R19 | 19" | 27.66" | +0.2% | Compare |
| 245/60R16 | 16" | 27.57" | −0.2% | Compare |
| 265/65R14 | 14" | 27.56" | −0.2% | Compare |
| 245/45R19 | 19" | 27.68" | +0.2% | Compare |
One size up or down
- 225/45R20wider: 28.0" × 8.9"
- 215/40R20lower profile: 26.8" × 8.5"
- 215/50R20taller sidewall: 28.5" × 8.5"
Compare 215/45R20 with another size
Questions
- How tall is a 215/45R20 tire?
- A 215/45R20 tire is 27.6 inches tall (702 mm), calculated from the size. It is 8.5 inches wide with 3.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 215/45R20 mean?
- 215/45R20 means a tire 215 mm wide, with sidewalls 45% as tall as the tire is wide (97 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 215/45R20 tire make?
- About 730 revolutions per mile, based on a circumference of 86.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 215/45R20 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 275/35R20 instead of 215/45R20?
- 275/35R20 is −0.04 inches (−0.1%) 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.