One of my road bikes is currently setup with 10 speed Dura Ace Double and I am contemplating on converting it to a climbing bike over the winter and at the same time be able to use it for regular road rides. I was thinking of having a low gearing of 22/24 on the front and 32/34 gearing in the rear. For this, I was planning on using an 11-34T cassette with a mountain rear dérailleur (XT or XTR) and a triple crank set for the front.
Can I use my existing 10 speed DA shifters on a 9 speed RD and cassette ? If I am not mistaken the cassette and XT/XTR RDs are nine speed.
As far as the front drive train, do I need a new FD. I also assume that I also need a left shifter for the triple.
Any other suggestions or alternatives is appreciated.Thanks in advance.