Originally Posted by
adgrant
The inner plate of my bikes front derailler rubs the chain when I am on the smallest chain ring (of a double) and the largest rear cog. If I upshift to any other cog, it doesn't rub.
Should I be adjusting the limit screws, the cable tension or rotating the FD?
After reading the solutions and your final response, it sounds like you have the problem licked. Let me add as a point of information:
ALWAYS adjust your rear der properly BEFORE adjusting the front der as the rear der operation will affect the operation of the front der.
ALSO, to eliminate as many variables as posssible, it is a BEST PRACTICE to shift gears by pulling the cables themselves when checking hi-lo limits initially. This eliminates the possibility that a sloppy shifting mechanism ( excess play, worn mechanism ) will mislead you while making adjustments.
While not addressing your specific problem, please keep in mind that MOST shifting and braking problems result from cable issues, usually inadequate lubrication and/or poor cable routing. Check the easiest things first... If your adjustments are good and it still won't shift or brake properly, see above. New cables and housings often cure many a stubborn problem.