I'm this faggot from the last thread
>>1008202Looking to replace a rusted/worn out front derailleur on a beat-up wal*mart 21-speed mountain bike that will probably get stolen before the year is up.
What do I need to care about when buying a new derailleur for this disposable bike? I figured out that there are different clamp sizes and pull up/pull down models, but is there anything else I should be looking for, or should I just buy the cheapest one that is pull down and has the right clamp size?
I am worried that I will buy something and then the grip-shifter on this bike won't have the right range of motion for the new derailleur or some other goofy problem will come up.