it's a shame you can't mix the groupset. 7900 cranks and 7800 everything else. i wouldn't pay extra for the 7900 unless you are racing. it does work well and the front shifting is meant to be the slickest out there but is it worth the extra?
i use 7800 shifters with ultegra everything else and the shifting is very slick.
personally i would rather have a better frame and ultegra.
it's a shame you can't mix the groupset. 7900 cranks and 7800 everything else. i wouldn't pay extra for the 7900 unless you are racing. it does work well and the front shifting is meant to be the slickest out there but is it worth the extra?
i use 7800 shifters with ultegra everything else and the shifting is very slick.
personally i would rather have a better frame and ultegra.