Enduro Maxhit Bottom Bracket BSA DUBMachined entirely from 440C stainless steel and guaranteed for life Maxhit BB bearings include proprietary double lip labyrinth seals and Enduros extra high pressure grease to ensure a lifetime of trouble free, heavy duty performance Bearings are designed to thread directly into your bicycles bottom bracket shell, eliminating the need for the aluminum cups that are traditionally used to carry the bearings This unique design frees up space for much