My son has a Boss Stealth mountain bike, The front derailleur has stopped working. It is a 3 cog Sunrun 42t (picture 1) which I am finding difficult to find.
The bike originally had Grip Shift changers and was changed to lever/brake combo about 6 weeks ago and worked fine so I don't think that has anything to do with the issue.
I have looked on Ebay and found so many different type I'm not sure which model I can replace it with. Picture 2 looks similar and has the correct teeth configuration. Picture 3 I'm not sure where the cable would attach.
Can anybody suggest a suitable replacement unit please