>>986747OP here--the only reason i can possibly fathom, and the only thing that tempted me, to buy the CAAD12 105 disc were those beautiful sculptural seatstays with no brake bridge.
outside of that, i'm paying an extra couple hundred bucks to add at least a pound to my bike for some crap that i neither need nor want. since when did road cyclists begin to believe they were downhill mountain bikers? i'll consider disc brakes on my road bike when a) they weigh the same as rim brakes, and b) my rides consist of nothing but descents