Speedometer Calibration Calculator
Calculate speedometer error after changing tire sizes
Tire Sizes
Original Tire Size
New Tire Size
Actual Speed
61.1 mph
When speedometer shows 60 mph
Tire Comparison
Original Diameter26.74"
New Diameter27.25"
Size Difference1.9%
Speedometer Error
Speed Difference+1.1 mph
Error Percentage+1.90%
Odometer Error+1.90%