Basically I went to first gear I heard a grinding noise shortly after it hit first gear the back wheel completely locked up and I looked at the derailleur and it was facing the sky that mark from the first photo is from the derailleur hitting that are I'm not sure what to do now I'm getting really tired of stuff like this happening just got the bike to almost being perfect good breaks gears changing cleanly and then this happens
by Complete-Junket-8209