Join Date: Jun 2010
Location: NW,Oregon Coast
Mentioned: 29 Post(s)
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Quoted: 1858 Post(s)
Chain line on a triple is measured from the middle CR.. lining up with the middle of the rear cogs
3 of 5, 4 of 7. or the space between the 2 middle cogs of even numbered 'speeds', 6, 8 ..
The crank profile design determines how the crank sits on the end of the axle..
so the 2 are best considered together..
Just Text on a computer, I cannot see the job from here .. good luck.
Last edited by fietsbob; 08-22-12 at 11:55 AM.