285/25R20 tire size in inches
A 285/25R20 tire measures
25.6" tall × 11.2" wide
2.81" sidewall on a 20" wheel. 788 revolutions per mile.
285/25R20 means a tire 285 mm wide, with sidewalls 25% as tall as the tire is wide (71 mm), radial construction (R), for a 20 inch wheel.
285/25R20 specs
| Overall diameter (height) | 25.61 inches (651 mm) |
|---|---|
| Section width | 11.22 inches (285 mm) |
| Sidewall height | 2.81 inches (71 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 80.5 inches (2,044 mm) |
| Revolutions per mile | 788 |
| Revolutions per kilometer | 489 |
| Approximate rim width | 9.5" to 11.0" |
| In inches (flotation style) | 25.6x11.2R20 |
| 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 285/25R20 on a 20" wheel
These 20" sizes are within 3% of 285/25R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 235/30R20 | 25.55" | 9.25" | −0.2% | 59.9 mph | Compare |
| 245/30R20 | 25.79" | 9.65" | +0.7% | 60.4 mph | Compare |
| 275/25R20 | 25.41" | 10.83" | −0.8% | 59.5 mph | Compare |
| 295/25R20 | 25.81" | 11.61" | +0.8% | 60.5 mph | Compare |
| 225/30R20 | 25.31" | 8.86" | −1.2% | 59.3 mph | Compare |
| 215/35R20 | 25.93" | 8.46" | +1.2% | 60.7 mph | Compare |
| 265/25R20 | 25.22" | 10.43" | −1.5% | 59.1 mph | Compare |
| 305/25R20 | 26.00" | 12.01" | +1.5% | 60.9 mph | Compare |
| 255/30R20 | 26.02" | 10.04" | +1.6% | 61.0 mph | Compare |
| 215/30R20 | 25.08" | 8.46" | −2.1% | 58.8 mph | Compare |
| 225/35R20 | 26.20" | 8.86" | +2.3% | 61.4 mph | Compare |
| 255/25R20 | 25.02" | 10.04" | −2.3% | 58.6 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/55R15 | 15" | 25.61" | 0.0% | Compare |
| 215/45R18 | 18" | 25.62" | 0.0% | Compare |
| 235/25R21 | 21" | 25.63" | +0.1% | Compare |
| 335/25R19 | 19" | 25.59" | −0.1% | Compare |
| 225/60R15 | 15" | 25.63" | +0.1% | Compare |
| 275/35R18 | 18" | 25.58" | −0.1% | Compare |
| 245/60R14 | 14" | 25.57" | −0.1% | Compare |
| 175/70R16 | 16" | 25.65" | +0.1% | Compare |
| 245/50R16 | 16" | 25.65" | +0.1% | Compare |
| 185/80R14 | 14" | 25.65" | +0.2% | Compare |
| 275/40R17 | 17" | 25.66" | +0.2% | Compare |
| 195/50R18 | 18" | 25.68" | +0.3% | Compare |
One size up or down
- 275/25R20narrower: 25.4" × 10.8"
- 295/25R20wider: 25.8" × 11.6"
- 285/30R20taller sidewall: 26.7" × 11.2"
Compare 285/25R20 with another size
Questions
- How tall is a 285/25R20 tire?
- A 285/25R20 tire is 25.6 inches tall (651 mm), calculated from the size. It is 11.2 inches wide with 2.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 285/25R20 mean?
- 285/25R20 means a tire 285 mm wide, with sidewalls 25% as tall as the tire is wide (71 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 285/25R20 tire make?
- About 788 revolutions per mile, based on a circumference of 80.5 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 285/25R20 tire?
- Roughly 9.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 235/30R20 instead of 285/25R20?
- 235/30R20 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.