Great thread and some really useful into here. I too am looking to make the change from compact to sub compact 46/30 but there's just one issue I'm having that I haven't been able to solve - maybe someone can point me in the right direction!
On my tricross (2012 model) I can't move the fd down to the correct position for the 46 chainring as the bottom of the cage hits the chain stay. Can anyone recommend a short cage fd that may work please? It's a 9 speed sora set up I'm afraid... Thanks in advance.