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Technical information on Wheels
Go here for Vehicle weight calculator
Go here for race Vehicle speed calculator
To Measure distances between Stud holes

   Vehicle Speed Calculator

New Zealand Speedway Rules

Race Vehicle Speed calculator

1.Juggle with the Pinion Gear numbers and the Crown Wheel Gear numbers to create your known Diff ratio.

2. Place the known rear tyre size in the third box

3.This calculator will indicate your vehicle speed [give or take wheel spin] for any given engine RPM.

Pinion Gear
Crown Wheel Gear
Diff Ratio
Rear Tyre Circumference
in / mm
Engine RPM
Calculated Vehicle Speed
    mph / kph