That part you're pointing to (don't know what it's called) seems one of the least likely parts to break in a collision or crash. There are other parts of the derailleur that will get torn up before that metal plate bends.
I'm guessing that metal plate exists to locate the pivot point at the correct place for that derailleur design. Narrower range RDs have the pivot point right where the RD screws into the hanger, but wider range RDs have the pivot point stood off from that point.
Originally Posted by
utoner34
Nothing is going on. I am aware that the hanger is a separate piece in the system. I thought its this part on the picture, but by looking at the diagram again, it seems this is just part of cage and cannot be replaced. I wanted to have a spare hanger. Is this system does not have a hanger, why is it built as such? And what happens if you hit the cage and it bends? (can you fix this ?)
