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Tire Size Difference Calculator
Different Tire and Wheel Comparison

Here's how it works:

I have 225/60/16 tires on my car right now:

  • 225 is the width in mm.
  • 60 is the Aspect Ratio %.
  • 16 is the Wheel/Rim Diameter in inches.
I want to know what the difference would be if I were to put a 275/40/18

on my car.

Tire Width
Aspect Ratio
Wheel Diameter
Original Tires 225 MM 60 Percent 16 Inches
New Tires 275 MM 40 Percent 18 Inches

Fill in the 6 values from the drop down list below and click Calculate:

Please Select Six Values Then Click the "Calculate" Button
Tire Width
/
Aspect Ratio
Wheel Diameter
Original Tires
/
New Tires
/

These Values Will be Calculated:
Original Tires Tire Height/Diameter (mm) Tire Height/Diameter (in)
New Tires Tire Height/Diameter (mm) Tire Height/Diameter (in)
Difference Tire Height/Diameter (mm) Tire Height/Diameter (in)
This Change Represents: %
Speedometer Error:
At 30 mph Indicated Actual Speed is: mph
At 60 mph Indicated Actual Speed is: mph
At 90 mph Indicated Actual Speed is: mph

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