275/55R20 tire size in inches
A 275/55R20 tire measures
31.9" tall × 10.8" wide
5.95" sidewall on a 20" wheel. 632 revolutions per mile.
275/55R20 means a tire 275 mm wide, with sidewalls 55% as tall as the tire is wide (151 mm), radial construction (R), for a 20 inch wheel.
275/55R20 specs
| Overall diameter (height) | 31.91 inches (810 mm) |
|---|---|
| Section width | 10.83 inches (275 mm) |
| Sidewall height | 5.95 inches (151 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 100.2 inches (2,546 mm) |
| Revolutions per mile | 632 |
| Revolutions per kilometer | 393 |
| Approximate rim width | 8.0" to 9.5" |
| In inches (flotation style) | 31.9x10.8R20 |
| 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 275/55R20 on a 20" wheel
These 20" sizes are within 3% of 275/55R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 335/45R20 | 31.87" | 13.19" | −0.1% | 59.9 mph | Compare |
| 305/50R20 | 32.01" | 12.01" | +0.3% | 60.2 mph | Compare |
| 235/65R20 | 32.03" | 9.25" | +0.4% | 60.2 mph | Compare |
| 255/60R20 | 32.05" | 10.04" | +0.4% | 60.3 mph | Compare |
| 295/50R20 | 31.61" | 11.61" | −0.9% | 59.4 mph | Compare |
| 345/45R20 | 32.22" | 13.58" | +1.0% | 60.6 mph | Compare |
| 245/60R20 | 31.57" | 9.65" | −1.0% | 59.4 mph | Compare |
| 225/65R20 | 31.52" | 8.86" | −1.2% | 59.3 mph | Compare |
| 325/45R20 | 31.52" | 12.80" | −1.2% | 59.3 mph | Compare |
| 265/55R20 | 31.48" | 10.43" | −1.4% | 59.2 mph | Compare |
| 285/55R20 | 32.34" | 11.22" | +1.4% | 60.8 mph | Compare |
| 315/50R20 | 32.40" | 12.40" | +1.5% | 60.9 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 335/30R24 | 24" | 31.91" | 0.0% | Compare |
| 315/40R22 | 22" | 31.92" | 0.0% | Compare |
| 295/60R18 | 18" | 31.94" | +0.1% | Compare |
| 315/60R17 | 17" | 31.88" | −0.1% | Compare |
| 235/75R18 | 18" | 31.88" | −0.1% | Compare |
| 345/40R21 | 21" | 31.87" | −0.1% | Compare |
| 285/35R24 | 24" | 31.85" | −0.2% | Compare |
| 285/75R15 | 15" | 31.83" | −0.2% | Compare |
| 275/50R21 | 21" | 31.83" | −0.3% | Compare |
| 275/60R19 | 19" | 31.99" | +0.3% | Compare |
| 32x11.50R15 | 15" | 32.00" | +0.3% | Compare |
| 305/45R21 | 21" | 31.81" | −0.3% | Compare |
One size up or down
- 265/55R20narrower: 31.5" × 10.4"
- 285/55R20wider: 32.3" × 11.2"
- 275/50R20lower profile: 30.8" × 10.8"
- 275/60R20taller sidewall: 33.0" × 10.8"
Compare 275/55R20 with another size
Questions
- How tall is a 275/55R20 tire?
- A 275/55R20 tire is 31.9 inches tall (810 mm), calculated from the size. It is 10.8 inches wide with 6.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 275/55R20 mean?
- 275/55R20 means a tire 275 mm wide, with sidewalls 55% as tall as the tire is wide (151 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 275/55R20 tire make?
- About 632 revolutions per mile, based on a circumference of 100.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 275/55R20 tire?
- Roughly 8.0" to 9.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 335/45R20 instead of 275/55R20?
- 335/45R20 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.