rear derailleur bolt stuck

[lph]

I'm not sure what the spindle is. The mounting bolt holding the derailleur to the frame will turn independently of the derailleur body, but only with a lot of force. To put it this way, I would have stopped yanking on the allen key if I hadn't been absolutely sure that that was the only way to remove the derailleur. And I know it's not the threads, they're fine.

I'm not certain if the derailleur is supposed to be able to pivot smoothly around the bolt during normal use, but it looks like it. At the moment it can only pivot around it if a lot of leverage is used, which doesn't happen during normal use.

Thanks for the link! The Park Tool guide to overhauling rear derailleurs shows a spring if you remove the plate which is directly between the derailleur body and the frame, which is why I'd rather not take it apart if I don't have to...

http://www.parktool.com/blog/repair-...lleur-overhaul
(about 3rd page down)