TIRE SIZE / SPEEDOMETER DEVIATION
When you mount other tires
under your car, you might get a deviation on your speedometer. How much
exactly this deviation is can be calculated here below.
This calculation uses the
following formulas : Tire height = Tire width X Series / 100
Height = Tire height X 2 + Rim size X 25,4Perimeter = Height X Pi
Updated : februari 13, 2005 - 05:00 CET