Dropper post fitting
I just bought a 2019 Cannondale Fat CAAD 2, I was lucky enough to find a leftover at a LBS. One thing I want to add is a dropper post and a buddy of mine has a brand new, never installed Cannondale DownLow dropper, 150mm. What am I looking for on my bike to see if it'll fit?
The dropper is 31.6mm diameter, upper tube lenth is 150mm and full length is 440mm.
My stock seatpost is a Cannondale C4 31.6x400mm and the seattube length on my bike is 440mm. Since the seattube length and full length of the dropper are the same (440mm), will it fit, or does it need extra room for clearance?
I also see it comes with a 1x remote, but a 2x is available.. Is that the length of the cable, or something different? My bikes a medium, how do I know if I need 1x or 2x?
THANKS!