i have a bike with shimano 105 sti shifting and two chainrings.
shifting up from the small chainring, the shifter can 'click' twice. the first 'click' doesnt catch the big ring and so i have to shift again. but, shifting down from the highest cable tension setting it jumps immediately to the lowest setting (skipping the middle 'click' setting). why arent there just two settings? is it made to be compatible with three chainrings? but then why wouldnt it stop on the middle setting when i downshift?
so i tried to adjust derailleur to move to the large chainring without having to up shift twice. but that didnt work.