Gear Ratio Speed Calculator for Standard Triumph Drivelines

The calculator is back!!!

Final Drive

This page was inspired by the gear ratio calculator that James used to host on – for the time being it doesn’t take into account overdrive setups.

To use :

  1. Set your tyre Width, Aspect and Diameter (e.g. a 175/70R13 tyre would have a Width of 175, Aspect of 70 and a Diameter of 13).
  2. Select a gearbox (or enter your own values)
  3. Select a differential/final drive (or enter your own value) and a maximum RPM limit

The graph and max speed values should automatically update when you change any value.