Gearing Calculator - RPM to km/h - mph with Auto Shift Tracer
Enter Gear and Diff Ratios and drag RPM Slider
See also: Printable Full Scale Degree Wheels
Dial in your cam - and Printable Timing - Degree Tape
Enter Diff + Gear Ratios and Tire Diameter, then drag RPM
slider to calculate speed from RPM.
Drag Max RPM
slider to adjust the range of the RPM and km/h Gauges.
Enter Shift at
RPM, select gear to shift to and hit Shift and Trace
to run up through the gears recording shift point RPM and km/h.
and enter alternate Tire Diameter or Diff Ratio to compare. The speedometer will display a second needle for the comparison.
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