215/40R20 tire size in inches
A 215/40R20 tire measures
26.8" tall × 8.5" wide
3.39" sidewall on a 20" wheel. 753 revolutions per mile.
215/40R20 means a tire 215 mm wide, with sidewalls 40% as tall as the tire is wide (86 mm), radial construction (R), for a 20 inch wheel.
215/40R20 specs
| Overall diameter (height) | 26.77 inches (680 mm) |
|---|---|
| Section width | 8.46 inches (215 mm) |
| Sidewall height | 3.39 inches (86 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 84.1 inches (2,136 mm) |
| Revolutions per mile | 753 |
| Revolutions per kilometer | 468 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 26.8x8.5R20 |
| Aspect ratio | 40% |
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 215/40R20 on a 20" wheel
These 20" sizes are within 3% of 215/40R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 345/25R20 | 26.79" | 13.58" | +0.1% | 60.0 mph | Compare |
| 245/35R20 | 26.75" | 9.65" | −0.1% | 60.0 mph | Compare |
| 285/30R20 | 26.73" | 11.22" | −0.1% | 59.9 mph | Compare |
| 335/25R20 | 26.59" | 13.19" | −0.7% | 59.6 mph | Compare |
| 295/30R20 | 26.97" | 11.61" | +0.7% | 60.4 mph | Compare |
| 355/25R20 | 26.99" | 13.98" | +0.8% | 60.5 mph | Compare |
| 255/35R20 | 27.03" | 10.04" | +1.0% | 60.6 mph | Compare |
| 275/30R20 | 26.50" | 10.83" | −1.0% | 59.4 mph | Compare |
| 235/35R20 | 26.48" | 9.25" | −1.1% | 59.3 mph | Compare |
| 225/40R20 | 27.09" | 8.86" | +1.2% | 60.7 mph | Compare |
| 325/25R20 | 26.40" | 12.80" | −1.4% | 59.2 mph | Compare |
| 305/30R20 | 27.20" | 12.01" | +1.6% | 61.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/30R21 | 21" | 26.79" | +0.1% | Compare |
| 195/70R16 | 16" | 26.75" | −0.1% | Compare |
| 225/55R17 | 17" | 26.74" | −0.1% | Compare |
| 275/45R17 | 17" | 26.74" | −0.1% | Compare |
| 295/25R21 | 21" | 26.81" | +0.1% | Compare |
| 245/25R22 | 22" | 26.82" | +0.2% | Compare |
| 205/85R13 | 13" | 26.72" | −0.2% | Compare |
| 275/50R16 | 16" | 26.83" | +0.2% | Compare |
| 245/40R19 | 19" | 26.72" | −0.2% | Compare |
| 175/85R15 | 15" | 26.71" | −0.2% | Compare |
| 215/75R14 | 14" | 26.70" | −0.3% | Compare |
| 215/70R15 | 15" | 26.85" | +0.3% | Compare |
One size up or down
- 225/40R20wider: 27.1" × 8.9"
- 215/35R20lower profile: 25.9" × 8.5"
- 215/45R20taller sidewall: 27.6" × 8.5"
Compare 215/40R20 with another size
Questions
- How tall is a 215/40R20 tire?
- A 215/40R20 tire is 26.8 inches tall (680 mm), calculated from the size. It is 8.5 inches wide with 3.4 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 215/40R20 mean?
- 215/40R20 means a tire 215 mm wide, with sidewalls 40% as tall as the tire is wide (86 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 215/40R20 tire make?
- About 753 revolutions per mile, based on a circumference of 84.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 215/40R20 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 345/25R20 instead of 215/40R20?
- 345/25R20 is +0.02 inches (+0.1%) 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.