SMALL BASE + LARGE BRAKE FRONT CAP + STD CAP REPLACEMENT + 100mm REFLEX + LARGE INTERNAL REFLEX BRAKE. BBG - NF#2 - O18SUGESTED CALIBERSelectADDED LENGTH (mm):165OVERALL LENGTH (mm):266DIAMETER (mm):50WEIGHT (g):638COMPONENTS SelectTHREADM12 X 1 M13 X 1 M14 X 1 M16 X 1 M18 X 1 & IMPERIAL