Black-Ops 19mm American MX Bottom Bracket BlackThe Black-Ops 19mm American MX Bottom Bracket is designed to adapt a traditional 68mm American-style frame shell to accept a heavy-duty, modern 19mm 3-piece crank spindle. This premium component features rugged, sleek black alloy cups and high-performance sealed cartridge bearings that lock out dirt and street debris for a butter-smooth spin. Engineered for aggressive BMX, dirt jumping, or street riding, this all-in-one press-fit kit delivers the stiffness, strength, and reliable durability you need to overhaul your setup and ride with absolute confidence.888571068564