Originally Posted by
Phil_gretz
Slow down a bit. Three questions you can answer:
1. What is the distance (in millimeters) from the centerline of your seattube to the line mid-way between your 50 and 34T chainrings?
2. What is the distance (in millimeters) from the line that bisects you rear dropouts to the center-most cog position in your freewheel (5-speed shown? 3rd cog. 6-speed? space between 3rd and 4th cog.)
3) What type of chain are you using (specific make, model of chain)?
I'd be able to help you if I knew these three things.
1. (With bike upside down, measured from middle of bottom bracket barrel to in between the two chain rings.. roughly 45 or 46mm
2. About 41mm (note, using a washer on the axle si that the chain clears the dropout in the smallest outer cog)
3. (Current setup, 9 speed cassette, new 9 speed chain.
so my chainline is about 4mm off then
Thank you