Motorized Bicycle Gear Calculator

deacon

minor bike philosopher
Jan 15, 2008
8,117
3
0
north carolina
the mph one does nothing for me. I entered it all in and it just sits there. I must be doing something wrong.
 

Dave31

Moderator
Staff member
Mar 1, 2008
11,204
29
38
Aztlán, Arizona
works fine for me. Only when using Internet Explorer. 13, 200, 1 should get you 15.something.
I guess its like the chat box for me...one day it will work for like five minutes..then all it says is "loading" it has not worked for me in weeks.
 

reg454

New Member
Jan 11, 2009
269
0
0
39
michigan
This is a great way to see "how fast" someone could relatively go on a motor bike at a certain rpm. I used it with a 26" rim 11tooth drive sprocket, 36tooth rear sprocket, and an rpm of 2200. It gave me the speed of 52mph. But somehow this does not seem right. But I don't know when I buid my bike I will put a tach and a speed gauge to see how close it is.
 

damonjackson_spl

New Member
Dec 2, 2008
83
0
0
Hoebart Australia
sprocket / jackshaft / jackshaft / wheel

Pedal Drive
23 / 20 / 40 / 14

Honda GX50 Drive
11 / 22 / 40 / 14

I can change sprockets easily so would love to know how to work it out mathamatically :D

cheers
 

Coval_PL

New Member
Jul 28, 2009
57
0
0
Gdynia/Poland
Here is my version of gear calc. It's small Open Office's spread sheet. It allows to calculate spead depends of wheel size, engine's RPMs and sprockets sizes in standard engine set and Shift Kit with standard bikes gears on rear wheel.
I hope it will be usefull for somebody :)
It'll be nice to see some suggestions and ideas to bild up this calculator.
 
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Dan

Staff
Staff member
May 25, 2008
12,775
106
48
55
Moosylvania
Very cool and thanks for sharing Coval.

I associated this with MSW infopath 2003 and won't work. Any one know how I can get it to open in another program?