185/70R20 tire size
185/70R20 in inches: 30.20" overall diameter — 7.28" wide, 5.10" sidewall.
Overall diameter 30.20 in 767 mm
Section width 7.28 in 185 mm
Sidewall height 5.10 in 129.5 mm
Revs / mile 668 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 767 mm | 30.20 in |
| Section width | 185 mm | 7.28 in |
| Sidewall height | 129.5 mm | 5.10 in |
| Rim diameter | 508 mm | 20 in |
| Circumference | 2409.6 mm | 94.87 in |
| Revolutions per mile | 667.9 | |
| Aspect ratio | 70% | |
Compare 185/70R20 to similar sizes
Frequently asked questions
What is the overall diameter of a 185/70R20 tire?
A 185/70R20 tire has an overall diameter of 30.20 inches (767 mm).
How tall is a 185/70R20 tire?
The sidewall height is 129.5 mm (5.10 inches), and the overall diameter from the ground to the top of the tire is 30.20 inches.
How many revolutions per mile does a 185/70R20 tire make?
A 185/70R20 tire makes approximately 668 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 185/70R20 tire fit?
A 185/70R20 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.