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Calculate Tire Diameter

Tire width (mm):     Aspect ratio:     Wheel size (inches):

Tire diameter (inches) =

Tire section width (inches) =

Tire sidewall (inches) =

This calculator will calculate tire diameter (height) from the standard information given on the sidewall: width, aspect ratio, and wheel size. The stock 93 RX-7 tires were 225/50/16. See the Wheel Offset Diagram for an explanation of section width.
 

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