I have an Ultegra/Tiagra mix triple — it's a 2012 Giant Defy 0, so Ultegra shifters and derailleurs with the rest made up of Tiagra and R563.
I'm interested in switching to a compact with the option of a Wi-Fli like 11/32 on the cassette. The idea being that I can keep similar ratios, but have the simplicity of a double up front, with fewer gear changes and less trimming etc.
What are my options do you think? What can I keep from the current setup, and what are my options for the cassette?
Or will it be more cost effective in the long run to just replace the groupo entirely?