Join Date: Jun 2006
Bikes: 03 Raleigh Professional (steel)
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Actually, that's an interesting question.
The rear chainline is measure to the center cog of the sprocket cluster, which would be located 6mm/2 = 3mm farther from the center of the dropouts if the cluster is the same width as the old one. So it would seem that the front chainline should be moved out 3mm to match. Otherwise,
chainline difference = (spread/2 - (cluster width difference)/2)
I'd like to see that demonstrated by measurement, though, before I acted on it.
Stupidity got us into this mess - why can't it get us out?
- Will Rogers