i currently own a 2002 Giant TCR 2 and have been pleased but as i am approaching 60 and hills aren't getting any easier was thinking of converting to a compact crank. I currently have a Shimano double crank with octalink and found a FSA OMEGA EXO COMPACT Crankset 175mm X 110MM BCD doe 9 speed The bottom bracket currently on there is an octalink 9.5 MM. Will it fit, both brackets are the same diameter. Thanks.