The Hope Bottom Bracket Stainless 68/73 mm is an upgrade for Shimano, RaceFace FSA and Truvativ (extra conversion kit required). Machined aluminium cups hold full stainless steel cartridge bearings, which are double sealed fully serviceable and removable. Non contact free running labyrinth seals protect the bearings externally. Suitable for both 68 and 73mm shell widths. Weight: 113g.