175/80R20 tire size
175/80R20 in inches: 31.02" overall diameter — 6.89" wide, 5.51" sidewall.
Overall diameter 31.02 in 788 mm
Section width 6.89 in 175 mm
Sidewall height 5.51 in 140 mm
Revs / mile 650 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 788 mm | 31.02 in |
| Section width | 175 mm | 6.89 in |
| Sidewall height | 140 mm | 5.51 in |
| Rim diameter | 508 mm | 20 in |
| Circumference | 2475.6 mm | 97.46 in |
| Revolutions per mile | 650.1 | |
| Aspect ratio | 80% | |
Compare 175/80R20 to similar sizes
Frequently asked questions
What is the overall diameter of a 175/80R20 tire?
A 175/80R20 tire has an overall diameter of 31.02 inches (788 mm).
How tall is a 175/80R20 tire?
The sidewall height is 140 mm (5.51 inches), and the overall diameter from the ground to the top of the tire is 31.02 inches.
How many revolutions per mile does a 175/80R20 tire make?
A 175/80R20 tire makes approximately 650 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 175/80R20 tire fit?
A 175/80R20 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.