I got a low-quality walmart bike for free in decent condition. I am trying to make it rideable. I have given up on the stock derailleur and bought a cheap shimano tourney direct mount derailleur to replace it with. I did not realize, however, that the old derailleur was a hanger mount derailleur. That means I need an appropriate bracket to mount the new derailleur. What bracket do I need?
(I am trying to avoid buying another hanger mount derailleur because the only one I am seeing is the RD-TZ31, which came stock on the bike and gave me nothing but trouble.)
The attachment point on the bike:
The old derailleur hooked around the axle bolt, and the extra little bolt also went into the dropout. I have no idea what the purpose is for the two holes above the dropout.