Home › 20" tire sizes › 285/60R20
285/60R20 tire size in inches
285/60R20 is 33.46" tall and 11.22" wide, and fits a 20" rim. In flotation (inch) sizing that is roughly 33.5x11.2R20.
285/60R20 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 33.46" | 850 mm |
| Section width | 11.22" | 285 mm |
| Sidewall height | 6.73" | 171.0 mm |
| Rim diameter | 20" | 508.0 mm |
| Circumference | 105.1" | 2670 mm |
| Revolutions per mile | 603 | |
| Aspect ratio | 60% (sidewall is 60% of the width) | |
Drawn to scale
Among the 131 sizes for 20" wheels on this site, 285/60R20 is #77 by height (shortest: 225/30R20, tallest: 365/85R20).
What people compare 285/60R20 with
Real comparisons drivers search for, worked out against 285/60R20:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/60R20 | -0.47" (-1.4%) | -0.39" | -0.23" | 60.9 mph |
| 275/65R20 | +0.61" (+1.82%) | -0.39" | +0.31" | 58.9 mph |
| 285/65R20 | +1.13" (+3.38%) | 0.00" | +0.56" | 58 mph |
| 295/60R20 | +0.48" (+1.43%) | +0.39" | +0.24" | 59.2 mph |
| 275/55R20 | -1.55" (-4.63%) | -0.39" | -0.78" | 62.9 mph |
| 305/55R20 | -0.25" (-0.75%) | +0.79" | -0.13" | 60.5 mph |
| 285/55R20 | -1.12" (-3.35%) | 0.00" | -0.56" | 62.1 mph |
| 265/60R20 | -0.94" (-2.81%) | -0.79" | -0.47" | 61.7 mph |
How the 285/60R20 numbers are worked out
The size code reads as 285 mm section width, 60% aspect ratio, R for radial construction and 20-inch wheel.
- Sidewall = 285 × 60% = 171.0 mm = 6.73"
- Diameter = 20" + 2 × 6.73" = 33.46"
- Circumference = π × 33.46" = 105.1"
- Revs per mile = 63,360" ÷ 105.1" = 603
Sizes that can replace 285/60R20 on a 20" wheel
Within 3% of 33.46". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 265/65R20 | 33.56" | 10.43" | +0.3% | 59.8 mph |
| 375/45R20 | 33.29" | 14.76" | -0.51% | 60.3 mph |
| 315/55R20 | 33.64" | 12.40" | +0.54% | 59.7 mph |
| 280/60R20 | 33.23" | 11.02" | -0.69% | 60.4 mph |
| 290/60R20 | 33.70" | 11.42" | +0.72% | 59.6 mph |
| 305/55R20 | 33.21" | 12.01" | -0.75% | 60.5 mph |
| 270/65R20 | 33.82" | 10.63" | +1.08% | 59.4 mph |
| 255/65R20 | 33.05" | 10.04" | -1.23% | 60.7 mph |
| 275/60R20 | 32.99" | 10.83" | -1.4% | 60.9 mph |
| 295/60R20 | 33.94" | 11.61" | +1.43% | 59.2 mph |
| 355/50R20 | 33.98" | 13.98" | +1.55% | 59.1 mph |
| 255/70R20 | 34.06" | 10.04" | +1.79% | 58.9 mph |
One size wider or narrower
Same height on a different wheel size
- 315/75R15 15" (+0.42%)
- 305/75R15 15" (-1.34%)
- 295/75R16 16" (-0.12%)
- 315/70R16 16" (-0.3%)
- 275/80R16 16" (-0.42%)
- 265/85R16 16" (+0.84%)
- 255/85R16 16" (-1.17%)
- 325/70R16 16" (+1.34%)
- 285/80R16 16" (+1.46%)
- 305/75R16 16" (+1.64%)
Questions about 285/60R20
How tall is a 285/60R20 tire in inches?
A 285/60R20 tire is 33.46 inches (850 mm) tall: the 20-inch rim plus two sidewalls of 6.73 inches each.
Is 285/60R20 a 33 inch tire?
Yes. At 33.46 inches tall it is commonly called a 33-inch tire.
How many revolutions per mile does a 285/60R20 make?
About 603 revolutions per mile, based on a calculated circumference of 105.1 inches.
What size can replace 285/60R20?
265/65R20 is the closest match on a 20" rim (+0.3% height). Check load index, speed rating and clearance first.
Compare 285/60R20 against any other size with the tire size calculator.