My Kobe 11 fl zoom midsoles fit great in my new boots. I'll obviously have to put the plastic reinforced mids back in when I hiking as there is no shank in the boot itself, but the zoom mids will work nice for light duty use.
I wear an 11.5 in kyrie's as well but pg1 fit snugly so I went up to a 12 and the fit is just right. I also wear and 11.5 in Jordan retros if that helps