225/65R18 tire size
225/65R18 in inches: 29.52" overall diameter — 8.86" wide, 5.76" sidewall.
Overall diameter 29.52 in 749.7 mm
Section width 8.86 in 225 mm
Sidewall height 5.76 in 146.25 mm
Revs / mile 683 speedo calibration
Full dimensions
| Measurement | Metric | Imperial |
|---|---|---|
| Overall diameter | 749.7 mm | 29.52 in |
| Section width | 225 mm | 8.86 in |
| Sidewall height | 146.25 mm | 5.76 in |
| Rim diameter | 457.2 mm | 18 in |
| Circumference | 2355.3 mm | 92.73 in |
| Revolutions per mile | 683.3 | |
| Aspect ratio | 65% | |
Compare 225/65R18 to similar sizes
Frequently asked questions
What is the overall diameter of a 225/65R18 tire?
A 225/65R18 tire has an overall diameter of 29.52 inches (749.7 mm).
How tall is a 225/65R18 tire?
The sidewall height is 146.25 mm (5.76 inches), and the overall diameter from the ground to the top of the tire is 29.52 inches.
How many revolutions per mile does a 225/65R18 tire make?
A 225/65R18 tire makes approximately 683 revolutions per mile. Your speedometer is calibrated to this number.
What rim size does a 225/65R18 tire fit?
A 225/65R18 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.