Compare tire dimensions and speedometer effects.
Most manufacturers recommend keeping any odometer error within 3% to avoid damage to your vehicle.
Enter tire specifications to compare sizes
This tool allows you to compare two different tire specifications to see how they impact your vehicle's height, width, and speedometer reading.
Enter the width, aspect ratio, and rim size for both your current and new tires. The calculator will show the percentage difference in diameter and its effect on your speedometer.
Calculation is based on nominal tire specifications. Actual tire dimensions may vary slightly between manufacturers.