Ceramic bearing bottom bracket for running DUB cranks in a BB30 frame Extremely reliable and efficient bottom brackets with coated ceramic bearings, tight variances and industry-leading durability Reduced friction and better protection from nature`s elements Long lasting durability and extreme performance Road rated seals, not intended for off-road use 68/73mm BB30 DUB Black RoadUPC/EAN/GTIN: 735201956107