285/65R20 tire size in inches
A 285/65R20 tire measures
34.6" tall × 11.2" wide
7.29" sidewall on a 20" wheel. 583 revolutions per mile.
285/65R20 means a tire 285 mm wide, with sidewalls 65% as tall as the tire is wide (185 mm), radial construction (R), for a 20 inch wheel.
285/65R20 specs
| Overall diameter (height) | 34.59 inches (879 mm) |
|---|---|
| Section width | 11.22 inches (285 mm) |
| Sidewall height | 7.29 inches (185 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 108.7 inches (2,760 mm) |
| Revolutions per mile | 583 |
| Revolutions per kilometer | 362 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 34.6x11.2R20 |
| Aspect ratio | 65% |
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 285/65R20 on a 20" wheel
These 20" sizes are within 3% of 285/65R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 335/55R20 | 34.51" | 13.19" | −0.2% | 59.9 mph | Compare |
| 305/60R20 | 34.41" | 12.01" | −0.5% | 59.7 mph | Compare |
| 315/60R20 | 34.88" | 12.40" | +0.9% | 60.5 mph | Compare |
| 345/55R20 | 34.94" | 13.58" | +1.0% | 60.6 mph | Compare |
| 35x12.50R20 | 35.00" | 12.50" | +1.2% | 60.7 mph | Compare |
| 295/65R20 | 35.10" | 11.61" | +1.5% | 60.9 mph | Compare |
| 275/65R20 | 34.07" | 10.83" | −1.5% | 59.1 mph | Compare |
| 325/55R20 | 34.07" | 12.80" | −1.5% | 59.1 mph | Compare |
| 355/50R20 | 33.98" | 13.98" | −1.8% | 58.9 mph | Compare |
| 295/60R20 | 33.94" | 11.61" | −1.9% | 58.9 mph | Compare |
| 325/60R20 | 35.35" | 12.80" | +2.2% | 61.3 mph | Compare |
| 355/55R20 | 35.37" | 13.98" | +2.3% | 61.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 295/80R16 | 16" | 34.58" | 0.0% | Compare |
| 345/50R21 | 21" | 34.58" | 0.0% | Compare |
| 355/45R22 | 22" | 34.58" | 0.0% | Compare |
| 305/65R19 | 19" | 34.61" | +0.1% | Compare |
| 335/40R24 | 24" | 34.55" | −0.1% | Compare |
| 325/65R18 | 18" | 34.63" | +0.1% | Compare |
| 315/55R21 | 21" | 34.64" | +0.2% | Compare |
| 295/75R17 | 17" | 34.42" | −0.5% | Compare |
| 275/85R16 | 16" | 34.41" | −0.5% | Compare |
| 315/50R22 | 22" | 34.40" | −0.5% | Compare |
| 295/55R22 | 22" | 34.78" | +0.5% | Compare |
| 325/50R22 | 22" | 34.80" | +0.6% | Compare |
One size up or down
Compare 285/65R20 with another size
Questions
- How tall is a 285/65R20 tire?
- A 285/65R20 tire is 34.6 inches tall (879 mm), calculated from the size. It is 11.2 inches wide with 7.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 285/65R20 mean?
- 285/65R20 means a tire 285 mm wide, with sidewalls 65% as tall as the tire is wide (185 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 285/65R20 tire make?
- About 583 revolutions per mile, based on a circumference of 108.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 285/65R20 tire?
- Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 335/55R20 instead of 285/65R20?
- 335/55R20 is −0.08 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.