Fsa bb30apf30a 24 reducer nbd el213this reducer bushing is designed to fit the 30mm bearings found in bb30 and pf30 bottom brackets and reduce the bearing to be compatible with 24mm outside diameter od chromoly spindle cranksets features allows the installation of fsa 24mm spindle mega ex0 cranksets into bb30a pf30 bottom bracket shells material aluminium cups with plastic covers bb shell width 73mm for road compatibility for k force light sl k light energy gossamer pro gossamer