285/60R20 tire size
285/60R20 is a metric size: 33.5" tall, 11.2" wide, on a 20" rim — about a 33.5x11.00R20. The sidewall is 6.7" and the tire turns 603 times per mile.
285/60R20 specs
| Overall diameter (height) | 33.46" · 850 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 6.73" · 171 mm (60% of width) |
| Rim diameter | 20" |
| Circumference | 105.13" · 2.670 m |
| Revolutions per mile | 603 (374 per km) |
| Inch (flotation) equivalent | 33.5x11.00R20 |
Equivalent sizes on a 20" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/55R20 common | 31.91" | -4.65% | -10 mm | 57.2 mph | compare → |
| 275/60R20 common | 32.99" | -1.41% | -10 mm | 59.2 mph | compare → |
| 275/65R20 common | 34.07" | +1.82% | -10 mm | 61.1 mph | compare → |
| 35x12.50R20 common | 35.00" | +4.59% | +33 mm | 62.8 mph | compare → |
| 265/60R20 common | 32.52" | -2.82% | -20 mm | 58.3 mph | compare → |
| 305/55R20 common | 33.21" | -0.76% | +20 mm | 59.5 mph | compare → |
| 285/55R20 common | 32.34" | -3.35% | 0 mm | 58.0 mph | compare → |
| 33x12.50R20 common | 33.00" | -1.39% | +33 mm | 59.2 mph | compare → |
| 295/60R20 | 33.94" | +1.41% | +10 mm | 60.8 mph | compare → |
| 295/55R20 | 32.78" | -2.06% | +10 mm | 58.8 mph | compare → |
| 295/65R20 | 35.10" | +4.88% | +10 mm | 62.9 mph | compare → |
| 285/65R20 | 34.59" | +3.35% | 0 mm | 62.0 mph | compare → |
| 305/50R20 | 32.01" | -4.35% | +20 mm | 57.4 mph | compare → |
| 35x11.50R20 | 35.00" | +4.59% | +7 mm | 62.8 mph | compare → |
| 35x13.50R20 | 35.00" | +4.59% | +58 mm | 62.8 mph | compare → |
| 255/60R20 | 32.05" | -4.24% | -30 mm | 57.5 mph | compare → |
| 315/60R20 | 34.88" | +4.24% | +30 mm | 62.5 mph | calculate → |
| 33x13.50R20 | 33.00" | -1.39% | +58 mm | 59.2 mph | calculate → |
| 35x15.50R20 | 35.00" | +4.59% | +109 mm | 62.8 mph | calculate → |
| 33x11.50R20 | 33.00" | -1.39% | +7 mm | 59.2 mph | calculate → |
| 375/45R20 | 33.29" | -0.53% | +90 mm | 59.7 mph | calculate → |
| 33x12.00R20 | 33.00" | -1.39% | +20 mm | 59.2 mph | calculate → |
| 33x22.00R20 | 33.00" | -1.39% | +274 mm | 59.2 mph | calculate → |
| 34x11.50R20 | 34.00" | +1.60% | +7 mm | 61.0 mph | calculate → |
| 325/50R20 | 32.80" | -2.00% | +40 mm | 58.8 mph | calculate → |
| 305/60R20 | 34.41" | +2.82% | +20 mm | 61.7 mph | calculate → |
| 35x13.00R20 | 35.00" | +4.59% | +45 mm | 62.8 mph | calculate → |
| 35x14.50R20 | 35.00" | +4.59% | +83 mm | 62.8 mph | calculate → |
| 33x14.50R20 | 33.00" | -1.39% | +83 mm | 59.2 mph | calculate → |
| 355/50R20 | 33.98" | +1.53% | +70 mm | 60.9 mph | calculate → |
| 315/50R20 | 32.40" | -3.18% | +30 mm | 58.1 mph | calculate → |
Try another size against 285/60R20
Questions
What size is 285/60R20 in inches?
285/60R20 is about 33.5" tall and 11.2" wide on a 20-inch rim — roughly a 33.5x11.00R20 in inch sizing.
What does 285/60R20 mean?
285 mm section width, sidewall 60% of the width (6.73"), radial construction, 20-inch rim.
What tire sizes are equivalent to 285/60R20?
On the same 20" rim, within 3% of the diameter: 375/45R20 (-0.53%), 305/55R20 (-0.76%), 33x11.50R20 (-1.39%), 33x12.50R20 (-1.39%), 33x12.00R20 (-1.39%), 33x13.50R20 (-1.39%).
How many revolutions per mile does a 285/60R20 tire make?
About 603 revolutions per mile (circumference 105.1").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.