Tire Size Comparison 🚗

Tire 1 (Original)

/R

Tire 2 (New)

/R
Diameter Difference
0.38%
0.09"
Speedometer at 60mph
60.2 mph
Actual Speed
✅ The diameter difference is within the recommended range (<3%).

About Tire Size Calculator

Compare the diameter, width, and sidewall height of two different tire sizes. This tool also calculates the speedometer error that occurs when changing tire sizes.

Understanding Tire Codes

Example: 205/55 R16

  • 205: Width of the tire in millimeters.
  • 55: Aspect Ratio (Height is 55% of Width).
  • 16: Rim diameter in inches.

How to Use

  1. Enter the details for Tire 1 (Original).
  2. Enter the details for Tire 2 (New).
  3. Check the diameter difference percentage.
  4. Ensure the difference is within 3% for safety.

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