I built up a fun road/cross bike this fall - its great for riding pavement to the trail areas, then gravel roads or mild single-track, then back home on the pavement. I used a 7800 Dura Ace triple drivetrain from an older road bike, and it works fine but I would like a lower bottom gear for those steep sections of slippery single-track. Currently have std 30-42-52 chainrings with an 11-30 cassette. My questions: Will a SRAM 12-32 cassette work well with my D.A. chain and derailleurs? Should I switch the inner chainring instead, say to a 28t? If so, will any model Shimano inner ring from a triple fit and be compatible on my D.A. crankset? Thanks for your expertise! BTW its a Salsa Vaya frameset with a disc brake wheelset with 35mm Clement adventure tires....so far just a kick to ride.