Join Date: Jul 2011
Location: Seoul, South Korea
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An unusually sinister front derailleur chain rub
I'm about to set off on a touring trip in a foreign country, and have bought a cheap but capable bike for the adventure at hand. Unfortunately, when I received the assembled bike, the FD couldn't even manage to move the chain to the highest chain ring. However, after reading up on Sheldon's, Park tools and various youtube guides, I did the following;
-aligned the FD properly
-Adjusted the height of the FD relative to the high ring wheel
-released the FD wire anchor bolt and tightened the slack as much as possible.
-further tightened the wire through the barrel adjuster
-Maxed out the H&L limit stops
+(I began by adjusting the RD which works like a charm)
This helped me reach the 3rd chain ring, but some problems still remain; while avoiding any cross-shifting, it is still impossible to shift to either lowest or highest cogs without the chain rubbing against the FD. (If I'm running on the 1st chain I can only go up to the 2nd cog, and if I'm running on the 3rd chain ring, I can only go to the 6th cog). I've found that this is the "ideal point" and that any further adjustment of the inner wire tension only leads to a trade off on either high/low rub.
It seems as if the "cage" isn't moving enough sideways to accompany both the extremes at any given setting.
Is there anything else I could do, or should I just accept that I wont be able to use the full potential of this bike?