Originally Posted by
DaveSSS
OK, then the chain was an inch too long, but now it is the correct length. Do not shorten it any more. Shortening it will reduce the wrap capacity.
You probably just need a longer B screw. It should be a common M4 thread that you can get at Ace hardware. Some people do a crude fix by turning the screw upside down so the head rests on the frame.
I tried the screw upside down, and only screwed it in a few threads. Looking from the side, the largest sprocket is just breaking "the plane" of the top pulley derailleur cage. I can't tell if it's actually hitting - but I don't hear clicking. Still, probably too close for comfort. I will try to rummage through my spare bolts.
As a side note, I also replaced my ultegra pulleys with forte metal pulleys. I don't know how wise this was - seems much noiser than before. I don't think this has anything to do with the pulleys hitting the sprocket - just figured I'd mention it.