Originally Posted by
BROOKLINEBIKER
Hi AnkleWork,
Just to clarify, I am new to bike repairs and learning my way around. I do not want to waste money on ordering the wrong parts. The direct mount derailleurs and the conventional derailleurs both look like they could fit. Physically, the parts look identical to me. Thus, I am asking which one is the right one to get or are both ok?
As the name suggests, the difference is in how the derailleurs attach to the frame.
Better quality frames have a little "finger" that extends down from the dropout area that the derailleur bolts onto.
Cheaper frames need a derailleur with a "claw" that is held on by the rear axle nut.
Once you know what to look for, the difference is obvious.