LF for the accentdeprived
Join Date: May 2005
Location: Budapest, Hungary
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Somebody here recommended ssconvert for these (and gear inch, etc) calculations. I have not had the chance to check if it is accurate in forecasting the ratios that will work with your chainstay length, but it's probably not a bad starting point if you don't want to use a tensioner. Nice little programme with a bunch of functions. Here you go: http://www.teambigtime.com/software/ssConvert.htm
There are numerous others, too.
If you have at least something like 3 mm of horizontal play in where exactly you put the wheel (say, the dropouts are at 45°), it should be easy. You might have to pick a slightly bigger or smaller cog then you originally intended, but if that bothers you, you can always get the desired gearing by changing the front chainring size as well. Ssconvert will help in picking the gear combo.
If you want to stay low budget, just pick the gear combo you want, take the superfluous derailers, shifters and chainrings off, shorten the chain and replace the cogs you don't need with spacers on your rear freewheel/cassette. This allows you to set a straight chainline from chainring to cog by playing with the spacers. (If you lack tools/expertise, have a mechanic do this for you)
Last edited by LóFarkas; 06-19-05 at 11:19 AM.