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Oh, Doug. Don't you have a gear ratio spreadsheet online?(6 posts)

Oh, Doug. Don't you have a gear ratio spreadsheet online?Kristin
Aug 26, 2003 8:15 AM
Where is that? With the new 13-28 cassette on my road bike, I'm spending too much time in the crossover gears and almost no time at all in the middle cogs. I have the old cassette and thought I might change it up a bit. (I'll have to buy some new tools... bummer. :)

Also, any rules I should know before interchanging them? I know the obvious ones already. Little - big and stick to 9 gears, etc...
spreadsheat scmeadsheatSteve_0
Aug 26, 2003 8:26 AM
hit the calculator buttons 108 times. viola!
You mean do math?Kristin
Aug 26, 2003 8:37 AM
I don't think so. Not when so many others have already done math so that I do not have to do it myself.
you'd have your answer by now. nm.Steve_0
Aug 26, 2003 8:39 AM
I'm not Doug, but ...tarwheel
Aug 26, 2003 8:53 AM
Here's one:

http://www.sheldonbrown.com/gears/
Don't need oneNatC
Aug 26, 2003 5:05 PM
Kristin, unless you will be changing wheels and tires, then all you need to know is the ratio of the front teeth to rear teeth. If nothing changes other than the rings and cogs, then all other factors stay the same and can be factored out. Just divide # of teeth on front ring by # teeth on rear cog and you have your ratio.

As my software programmer buddy would say, "Someone should write a program to calculate this!" It's just one number divided by another.

Nat