Our threaded 30mm bottom bracket shares the same high quality design and durability as our well proven 24mm version. External bottom bracket designed for threaded bottom brackets. The machined aluminium cups hold stainless steel cartridge bearings in stainless races. High quality stainless steel bearings give a much greater life span than stock units. Cartridge bearings are replaceable. The unit is suitable for 68, 73, 83, 100 and 120mm width bottom brackets. Designed to suit cranks with 30mm axles. Please note specific fitting tool (HTT188) needed to fit bottom bracket. Available separately