LEGENDS > Drivetrain & Gearing
Gear Ratio Selection Tool
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Tom Cole:
This is an excel spreadsheet I made that you can use to help you select the rear gear for a track. It needs some tweaking. Please post your questions and comments here in this thread and I will try to take everything into account and make it better.
justfreaky:
I've used this one for my go kart and mini trike projects. Might help.
http://www.sadik.net/gokart/calc.htm
bandostuff.com:
Here is a link to download a free program for gears, speeds and weights. This program was devoloped for karts but works for anything.
Try ti you'll like it!
http://www.nacoma.cc/kartsmart.htm
justfreaky:
GEAR CHART:
Rear End Gear Transmission Gear Final Gear Ratio
--------------------------------------------------------------------------------
2.50 1st 12.50
2nd 8.75
3rd 6.87
4th 5.65
5th 4.88
--------------------------------------------------------------------------------
2.93 1st 14.65
2nd 10.26
3rd 8.06
4th 6.62
5th 5.72
--------------------------------------------------------------------------------
3.30 1st 16.50
2nd 11.52
3rd 9.07
4th 7.46
5th 6.44
--------------------------------------------------------------------------------
3.33 1st 16.65
2nd 11.66
3rd 9.16
4th 7.52
5th 6.50
--------------------------------------------------------------------------------
3.42 1st 17.10
2nd 11.97
3rd 9.40
4th 7.73
5th 6.67
--------------------------------------------------------------------------------
3.58 1st 17.90
2nd 12.53
3rd 9.84
4th 8.09
5th 6.99
--------------------------------------------------------------------------------
3.73 1st 18.65
2nd 13.06
3rd 10.25
4th 8.43
5th 7.28
--------------------------------------------------------------------------------
3.90 1st 19.50
2nd 13.65
3rd 10.72
4th 8.81
5th 7.61
--------------------------------------------------------------------------------
4.10 1st 20.50
2nd 14.35
3rd 11.27
4th 9.26
5th 8.0
--------------------------------------------------------------------------------
4.30 1st 21.50
2nd 15.05
3rd 11.82
4th 9.71
5th 8.39
I believe this to be the transmission gear output ratios:
Gear Gear teeth Ratio
1st 40/14 (2.857)
2nd 36/18 (2.000)
3rd 33/21 (1.521)
4th 31/24 (1.291)
5th 29/26 (1.115)
Primary reduction ratio 98/56 (1.750)
Secondary reduction system 40/17 (2.353)
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