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Tyre Size Calculator

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Select the dimensions of your tyres to determine the overall diameter

Correct matching of overall diameter when changing wheel and tyre sizes
is necessary to ensure ride height and gearing remain the same.

 

Remember that your car may NOT be able to accept a large tyre size that matches exact to your current tyres, the closest match may have to do but this is one of the consequences of changing your wheel size.

 

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Tread
Width
Profile
Height
Wheel
Diameter
Overall Tyre
Diameter
  mm   %   inches   inches   mm
NOTE: it is possible to select impossible tyre sizes or sizes that are not made!
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  mm   %   inches   inches   mm
We recommend ±2.5% is the MAXIMUM difference in diameters
Difference in Diameter:     percentage =   %    actual =  mm
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