Originally Posted by
Winfried
Will it fit a
FH-QC400-HM hub? Is a 9T and the chain as durable? What 9-34T cassette should I get?
If it won't fit, what square taper should I get so it pushes the dual chainring far enough outward to work with the derailleur?
That hub will work with any 8 to 11 speed HG cassette. The 9 speed chain is durable, not so much the 9t cog. The only Shimano HG cassette with a 9t cog is the Capreo, which I have used with good success. You can use any 9 speed derailleur and shifter with the Capreo cassette, even MTB parts.
You can run a Hollowtech MTB bottom bracket, which will add 5mm to the width, you can tune the chain line with spacers.