285/50R20 tire size
285/50R20 in inches: 31.22" overall diameter — 11.22" wide, 5.61" sidewall.
Overall diameter 31.22 in 793 mm
Section width 11.22 in 285 mm
Sidewall height 5.61 in 142.5 mm
Revs / mile 646 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 793 mm | 31.22 in |
| Section width | 285 mm | 11.22 in |
| Sidewall height | 142.5 mm | 5.61 in |
| Rim diameter | 508 mm | 20 in |
| Circumference | 2491.3 mm | 98.08 in |
| Revolutions per mile | 646.0 | |
| Aspect ratio | 50% | |
Compare 285/50R20 to similar sizes
Frequently asked questions
What is the overall diameter of a 285/50R20 tire?
A 285/50R20 tire has an overall diameter of 31.22 inches (793 mm).
How tall is a 285/50R20 tire?
The sidewall height is 142.5 mm (5.61 inches), and the overall diameter from the ground to the top of the tire is 31.22 inches.
How many revolutions per mile does a 285/50R20 tire make?
A 285/50R20 tire makes approximately 646 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 285/50R20 tire fit?
A 285/50R20 tire is designed for a 20-inch rim (508 mm).
All dimensions calculated using standard ETRTO formulas. Always confirm fitment with your vehicle's door-placard and a qualified tire professional before purchasing.