Originally Posted by
jimc101
It's a front derailleur, it doesn't care who makes the shifters or indexing, and it's too bothered about the speed either (at the back, it does at the front) + Suntour only lasted till 7 speed, so it's the same as you currently have.
I disagree with the bolded part. Ft indexing does want specific and matching components if you want best function. Otherwise matching cage shape and ring sizes is a want too. Running a ft der made for a 52/53 ring on a 42 ring makes for a lot of open ring/cage gap where it counts. Much like having your guide pulley too far from the rear cog's underside. Andy