Does anyone know if a Shimano model FC-4550S compact crank, 175mm; 110mm BCD is compatable with a Shimano 105 bottom bracket? I would think so but not totally sure.
I'd assume the only concern would be the BB spindle to crank interface. I am not familar with that crank or BB model, but the basic two Shimano interfaces would be square taper or Octalink. These two designs are quite noticeably different. So if the interfaces look the same, they are compatible.