Originally Posted by
Ridefreemc
Do you have to change out the shifters as well (from a compact double to triple)? I have Shimano brifters with my CD (Ultegra) and considered going to a triple.
How many cogs do you have on the back?
For 9-speed stuff, Shimano actually uses the same part number for doubles and triples. I techincally own (the bikes live at my sons' houses) a double crankset road bike and a triple crankset tandem that use identical Ultegra shifters. As a double I get 2 shift positions for each chainring. As a triple I get 1 position for the granny, 2 for the middle ring and 1 shift position for the big ring. Both bikes have flight Deck computers and both always indicate the appropriat chainring so I'm pretty sure they are set up the way that Shimano intended.