Gear Ratio will work for karts, race cars, bicycles, trucks, or any other vehicle type by calculating gear ratio, overall driveline ratio, and vehicle speed in both US and Metric units. Gear Ratio provides six independent input pages. So you may enter, check, and save multiple scenarios. The history is saved so last value entries can be reviewed for quick and easy reference. Simply type a value into any one of the inputs, and it is immediately converted into the each of the other types. Press the "Send" button to email the results to yourself or a race buddy.

INPUTS

Drive Gear:
- Enter the number of teeth
Driven Gear:
- Enter the number of teeth Axle Ratio:
- Enter the numeric axle ratio (e.g 3.73), or enter 1.0 if you drive a kart or bike.
- Tire Size (selected with Circ/Revs/RR tab):
- Tire Circumference
- Enter the circumference of the tire in inches or mm.
- Tire Revs/Mile or Revs/KM
- Enter the revolutions per mile or revolutions per kilometer of the tire.
- Tire Rolling Radius
- Enter the tire's rolling radius in inches or mm.
Engine Speed:
- Enter the engine speed you want to calculate for.

OUTPUTS

Gear Ratio:
- This is the calculated ratio of driven gear / drive gear
Overall Gear Ratio:
- This is gear ratio multiplied by axle ratio
Vehicle Speed:
- This is overall ratio multiplied by tire circumference and engine speed.

SWITCHES AND BUTTONS

US/Metric:
- Selects between inches/mm for the tire circumference and KMH/MPH for the output
Circ / Revs / RR:
- Selects between Tire Circumference (Circ), Revolutions per mile/km (Revs), and Rolling Radius(RR)
Send:
- If you want to save the data on your computer or send it to someone, just click on the "Send" button to email the calculation results.
Clear:
- Clears and Resets the content in the current page.

PAGE DISPLAY

6 Independent Pages: (swipe finger sideways in the middle, or click on the bottom right or left of the screen)
- Gear Ratio has six different pages so you can enter and check several different scenarios.
- Since the history is also saved, each pages last value can be reviewed for quick reference.