Originally Posted by
jawknee530
So the current rd is not indexed? And why the x30 instead of say the m310 shifters?
I suggested the X30 because the front shifter is non-indexed so it will work with the existing Suntour FD despite any cable pull differences.
However, derailleurs rarely wear out. So if your existing Suntour shifters are functional and there's no apparent damage to the derailleurs, a new chain and proper tuning may let you keep everything stock.