I'm thinking of converting my road bike's triple crankset to a compact double crankset, and I'm making a list of things I'll have to buy. Obviously, I would need compact cranks. Would I need a new bottom bracket? My bike currently has a square taper bottom bracket. Also, is the spacing between the two chainrings the same on a compact as it is on a triple? If so, can I use my existing shifter (Shimano 2200 3-speed)? And what about the front derailleur? Will it be compatible?
I tried searching the forums, but I couldn't find a thread that addressed all of these issues.