Bought a bike used, it was shipped. I'm thinking the rear derailleur or hangar was bent during shipping, but this is my first geared bike in a long time, so I don't really know...

Tried setting low limit screw as tight as possible with cable just tight enough to get it to shift down. The low limit screw doesn't actually stop tightening. It just gets to a point where it spins and does nothing. Even with the screw as tight as possible the derailleur tries to throw the chain into the spokes, and the bottom pulley actually touches the spokes.

Is something bent? Is the derailleur trashed? LBS fixable only or can I do it? Pics follow:





This is the best way I could think to show the alignment. The shifter is in the lowest gear, the cable is just tight enough to get the chain to move across the cassette, and the low limit screw is as far in as possible. I can take pictures from different angles if it helps.

Thanks for looking.