Tire Size Converter
Convert tire dimensions.
Result
Tire diameter
24.878in
- Circumference
- 78.156in
Common questions
How do I read a tire size like 225/65R17?
225 is the width in mm, 65 is the aspect ratio (sidewall height as % of width), R means radial construction, and 17 is the wheel diameter in inches. The calculator converts between metric and inches.
Can I use a different tire size than stock?
Yes, but stay within 3% of the original overall diameter to avoid speedometer errors and clearance issues. Use the calculator to compare your stock size against alternatives.