Do you know for a fact that there was a cable sleeve on the rear derailer cable before changing the cable? If you shake the bike can you hear it flopping around in the down tube?
The openings don't look all that different to me. It almost looks like a cable sleeve could fit in there. Some bike shops have the sleeving in stock, it's kinda rare, however.
Better pic required for BB ID. Almost look like wrenchflats on the fixed cup, but hard to tell from that pic. A pic from the other side of the bike might be easier.
Last edited by LesterOfPuppets; 12-23-08 at 02:26 AM.