I'm newer to cycling so sorry in advance if anything I'm saying is ********..
I just picked up a set of practically new Mavic cxp21 wheels (8/9/10speed compatible according to specs) laced with ultegra 6600 hubs off a friend for $75.. Now my bike has a Shimano "SIS" 12 spd derailleur on it.. I'm GUESSING that these wheels aren't going to fit with the 6 ring cassette that's in the the rear. I was wondering..
1) Any chance this is extremely easy and doesn't even require me to change anything?? please?? ha
2) If i do need to switch out parts would it simply be the cassette? or the derailleur as well?