205/70R18 tire size
205/70R18 in inches: 29.30" overall diameter — 8.07" wide, 5.65" sidewall.
Overall diameter 29.30 in 744.2 mm
Section width 8.07 in 205 mm
Sidewall height 5.65 in 143.5 mm
Revs / mile 688 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 744.2 mm | 29.30 in |
| Section width | 205 mm | 8.07 in |
| Sidewall height | 143.5 mm | 5.65 in |
| Rim diameter | 457.2 mm | 18 in |
| Circumference | 2338.0 mm | 92.05 in |
| Revolutions per mile | 688.4 | |
| Aspect ratio | 70% | |
Compare 205/70R18 to similar sizes
Frequently asked questions
What is the overall diameter of a 205/70R18 tire?
A 205/70R18 tire has an overall diameter of 29.30 inches (744.2 mm).
How tall is a 205/70R18 tire?
The sidewall height is 143.5 mm (5.65 inches), and the overall diameter from the ground to the top of the tire is 29.30 inches.
How many revolutions per mile does a 205/70R18 tire make?
A 205/70R18 tire makes approximately 688 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 205/70R18 tire fit?
A 205/70R18 tire is designed for a 18-inch rim (457.2 mm).
All dimensions calculated using standard ETRTO formulas. Always confirm fitment with your vehicle's door-placard and a qualified tire professional before purchasing.