The new SRAM DUB bottom bracket series has a simple task: to ensure optimal power transfer on your bike for as long as possible. To support this, SRAM has made the DUB spindle the decisive factor. An oversized spindle that works with all bottom bracket standards. This ensures compatibility and better protection from the elements. For better, longer, stronger, smoother, and simpler performance. * An oversized spindle that works with all BB standards * Significantly lighter than the PFGXP system * Easier to install because the bearing cups can be pressed into the frame * Two fully sealed cartridge bearings * ISO 4210 compliant