I have a 06' Trek 1000 with a three ring crankset I'd like to swap out for a newer 105 two ring crankset. The current setup is a square BB. I'm looking to go two ring, since I have never used the granny gear and never plan to do any hill climbs with this commuter. Also, it'll be easier for me to tune-up I figured.
My question is, what all do I need to buy aside from the crankset? I figure the BB. Also, what do I do to align the derailer from three to two ring?
Perhaps I should look for a used or NOS square crankset?