Not something Ive looked to far into but i own a anthem x with a press fit bottom bracket an no tabs for any form of chain device how do you get around this to keep the chain on, also comming from 3×10 what sort of gearing do you lose top an bottom? i generally dont use my granny but do use the big ring on the road down hill etc also what sort of weight savings are gained? i understand you loose your shifter,cables,mech an two rings but them chain devices an bash guards dont look over light? Cheers for any light shed