Originally Posted by
josephjhaney
do you have a micro adjustment on your shifters? Are you running a double or triple. If it's a triple, then there really isn't a need for you to spend much time in little, little. But, if it's a double, you're looking at the micro adjusting (like a half shift) or adjusting your tension on your cable so that the rub doesn't happen (more tension on the shifter will cause it to move toward the next ring up on the front, and provide more clearance for the chain).
The other thing that can cause the rub is if the fd is not straight, ie, if it's angled, to check this put the der as close as you can get it to directly over one of the chainrings, and stand over it, see how close to parallel they are, it should be very close to parallel.
A third option to kind of "cheat" is to angle your fd "out" just a bit, to allow for more clearance in those outer gears, but this may have unwanted results on the lower gears, as it may then rub when in small/big combo, which you will indeed need, regardless of double or triple setup.
Joe
Ok, not sure what micro adjustment is. Where can i find it? I am running a double. it's 2008 chorus group. I wasn't sure about cable tension when i was setting up and was playing with a little looser a littler tighter for a while until i got close like it is now. the cable was already running from the shifter so i wasn't sure how tight to pull it when i was tightening it down to the F/D.
The FD looks exactly or almost exactly parallel.
You are right that if I angle it out i get rub on the lower gears.
another question, how close should the crank arm come to the F/d when in 53/12?