Well, if my 2008 shifters work with a new RD, then they also work with older RD. Any combo works. It's the FD that's different. The new FD shifts to the little ring with only 1 click. I also made a minor modification to a 10 speed RD so it shifts 11 speed. All I did was grind down the cable clamp bolt to the root of the threads in the area where the cable contacts the bolt. That shortens the lever arm length slightly and increases the total travel so it shifts 11 speed quite well.
Last edited by DaveSSS; 09-06-18 at 07:34 AM.