Gear Ratio Designer

Enter the drive teeth and the driven teeth and Gear Ratio Designer computes the gear ratio directly on the page, so you can adjust assumptions and watch the result follow.

1. 1

   Step 1

   Specify the vehicle specifications.

2. 2

   Step 2

   After entering the values, click "Calculate" to view the output.

3. 3

   Step 3

   Use the result while keeping the context and units in mind.

• 1

  Enter the drive teeth and the driven teeth in the units each label names: Gear Ratio Designer computes the gear ratio from those values as written, and one mismatched unit moves every downstream number while the result still looks plausible on screen.

• 2

  Test scenarios one at a time: change the drive teeth while the rest stay fixed and the movement in the gear ratio is attributable to that single change, which turns Gear Ratio Designer into a comparison tool, not a one-shot answer.

• 3

  Save the input set beside each result before closing the page: when your numbers change, Gear Ratio Designer only needs the moved fields re-entered, and the documented assumptions keep the old and new outputs comparable.

• Swapped inputs: Gear Ratio Designer cannot tell the drive teeth from the driven teeth, and the gear ratio still looks plausible; re-read every labeled field before you quote the result.

• Copying the output and discarding the inputs: a bare result cannot be audited later, because the page has no memory of yesterday's entries — the assumptions travel with the number or the number is worthless in a month.