The SRAM DUB bottom bracket series has a simple job—connect your crankarms and protect the smooth, long-lasting application of power to your drivetrain. To allow that singular focus, SRAM has engineered the DUB™ spindle to be the one true unifying component. One oversized spindle to work across every bottom bracket specification. For better crankarm compatibility. For better protection from the elements. For longer-lasting performance. To be stronger, smoother, and simpler. One oversized spindle to work across every bottom bracket specification. Easy installation PressFit cups for lighter weight Sealed cartridge bearings available in both stainless and ceramic versions Details: Model: BB-DUB-PF30-A1 Spindle Interface Type: SRAM DUB Bottom Bracket Shell I.D.: 46 BB/Frame Interface: PressFit 30 Bearings: Ceramic or Stainless Steel Compatibility: The SRAM DUB PressFit 30 bottom bracket is compatible with the following: Crankset: SRAM DUB Cranksets Frame Interfaces: 68/73mm (MTB) 68mm (Road Wide) 73mm (MTB Wide) 73mm (Road) 73mm (Road Wide) 79mm / BBRight (Road) 79mm / BBRight (Road Wide) 83mm (MTB) 83mm Cannondale-Ai (MTB) 83mm Cannondale-Ai (Road) 86.5m (Road Wide) 100mm (MTB)