185/65R20 tire size
185/65R20 in inches: 29.47" overall diameter — 7.28" wide, 4.73" sidewall.
Overall diameter 29.47 in 748.5 mm
Section width 7.28 in 185 mm
Sidewall height 4.73 in 120.25 mm
Revs / mile 684 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 748.5 mm | 29.47 in |
| Section width | 185 mm | 7.28 in |
| Sidewall height | 120.25 mm | 4.73 in |
| Rim diameter | 508 mm | 20 in |
| Circumference | 2351.5 mm | 92.58 in |
| Revolutions per mile | 684.4 | |
| Aspect ratio | 65% | |
Compare 185/65R20 to similar sizes
Frequently asked questions
What is the overall diameter of a 185/65R20 tire?
A 185/65R20 tire has an overall diameter of 29.47 inches (748.5 mm).
How tall is a 185/65R20 tire?
The sidewall height is 120.25 mm (4.73 inches), and the overall diameter from the ground to the top of the tire is 29.47 inches.
How many revolutions per mile does a 185/65R20 tire make?
A 185/65R20 tire makes approximately 684 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 185/65R20 tire fit?
A 185/65R20 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.