DUB(TM) technology features a better engineered bottom bracket and a new spindle design for a more uniform approach to bottom bracket fitment, better sealing against contamination, and a new measure of durability For use with all SRAM DUB cranks and 68/73mm BSA threaded shells Specification - BB Shell Thread British - BB Shell Width 73mm - BB Bearing Steel - Crank Spindle Diameter 28.99mm - Interface DUB - Primary Color Black - Vendor Item # 00.6418.015.000 - UPC 710845813726 - EAN - Unit of measure Each - Legacy # - Shipping Length (L) 4.7 in - Shipping Width (W) 3.3 in - Shipping Height (H) 2.2 in - Shipping Weight 0.25 lb