Originally Posted by
3speedslow
Excessive cable tightening might be the culprit. In the derailleur rest position( small chainring) it is okay to have slight cable tension, not super taunt. Release your cable and adjust your stops first. Then add you cable tension and see how it does.
You can do this! Also, how is the little red sticker on the FD in relation to the big chainring and the cage line to the chainring angle.
Wow, this front derailleur is really testing me. I was able to get rid of the chain rub slightly. It looks like the front derailleur wasn't fully tightened down, so maybe it turned? The clamp screw was very easy to loosen. I believe maybe the derailleur cage wasn't fully parallel to the large gear. It's hard to gauge this though because the cage appears to be curved. I removed the little red sticker after I put the bike together!
I read that the space should be about 3mm between the edge of the cage and the teeth of the large chainring, so I made sure the height was about that.
Now I've run into an even worse problem. I can switch up to the large front chainring pretty smoothly, but when I shift back down to the smaller chainring often times the derailleur will just grind against the large chainring and not push the chain down.