...change out my 9-speed Shimano LX touring crankset (48-38-28) with a 10-speed Truvativ Elita cross crankset (48-34). Both are external bearing cranks. Will I need to put 9 speed chainrings on the Truvativ? Will I need to get a 10 speed chain if I keep the 10-speed chainrings? I think I'm ok with shifter (Dura Ace bar end shifters) and FD (LX with 48T capacity).