Black Ops Mid/USA Dualie Bottom Bracket, Black Review Posted by Pelicandy October 3, 2018 in Drivetrain Components Compatible with both American and Mid style BB shells 6061-T6 full CNC alloy construction Anodized surface finish Black Ops Mid/USA Daulie bottom bracket in two different size options Random Products Chain Guard 26″ Black. Review UPANBIKE Bike Crankset with Bottom Bracket for Roa... 1-Piece Crank Bearing, Various Sizes Review K-Edge Cross Single XL Chain Catcher Review Black Ops Cycling Outdoor Recreation Parts & Components Sports & Outdoors