Thread: Ask your small, random, track-related questions here
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Old 12-16-14, 10:53 PM
  #1641  
slindell
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Originally Posted by Quinn8it
Before Fixed Gear Fever went away- i had a friend convert the "Gear Spread Sheet" that was on the site in to a Google-Doc.. It works great, but at some point someone pointed out that it is giving off bad numbers.. for sure RPM to Speed is bad..

Maybe one of you Smart Guys could take a look and see if its fixable? thx!

its a public file- feel free to change it, copy it, whatever..

https://docs.google.com/spreadsheet/...3c&usp=sharing
What is wrong? The numbers look good for a 27" wheel size which will be a few percent off an actual wheel size. The calculation for rpm to speed in the sheet is gear inches * pi * rpm * 60(min per hour) / 12(inches per foot) * 5280 (ft per mile) then a km/mile factor. That looks correct unless I am missing something when looking at the sheet.
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