SRAM mountain double compatible with Rival BB, FD and brifters?
Thinking of getting a CX bike equipped with SRAM Rival drivetrain. Lowest gear on it now is 38x26 (~39.5 gear inches) which isn't sufficient for me to tour with a trailer around the Rockies, one of the intended uses for this bike. I can swap chainrings to a 50/34, put on a mountain derailleur and 11-36 cassette, but this will only get me to 34x36 (~25.5) which might be enough, but just barely. Can I throw a SRAM mountain double on as well and keep the same bb, derailleur and brifters? If I wanted to make it a triple would I just have to switch the FD?