jpilot's Gear Ratio Calculator -

[jpilot]

I wrote a little gear ratio calculator that some might find handy. The program can be downloaded from http://jimsitton.net/ratiocalc/ Just right click on the file gearratio.exe and select "save link as" and put it somewhere you can find it again. Once it's saved, double click on the gearratio.exe file and it will run.

The program allows for up to three ratios in series. If you have fewer just leave the unused ratios set to 1:1.

The program will also calculate speed based on engine RPM, drive ratio,and wheel diameter. Be sure to measure the outside diameter of your wheel for accurate results.

If you have any questions post them in this thread.

Have fun!

 

[srdavo]

For friction drives:
Leave all ratios set at 1:1

use the diameter of the friction drive roller, not
the size of the driven wheel, as input to the wheel diameter field.


Link to original post, for discussion & questions. http://www.motoredbikes.com/showthread.php?t=7711

 

[MotorBicycleRacing]

Indispensable gear ratio calculator.

 

[The_Aleman]

Quick and simple, this program helped me gear my shifter bike properly.

One can open multiple instances of it to get ratios for multispeed bikes. Easy to use with internally-geared hubs, too.

 

[CrazyDan]

I've been using this tool for over 3 years. It's accurate as fork.