Originally Posted by darkmother

I'm guessing the racers don't run triples because they don't really need the granny gear-they are off the bike before they would ever use it. I suppose you could argue that the chainline is better with a double, but this is fairly insignificant, IMO. I doubt that the extra 100 grams gained from using a triple is really going to cost you the race. If you want your bike to do it all, go with the triple.

CX is pretty traditional. I think many people are scared to break the mold. Go with what works, not with what everyone else is riding.