You had your choice of any bike in the shop but you made your selection based on potential upgrade options. The Press Fit 4624 will easily accommodate your handpicked rig with its press fit, 46mm diameter with 24mm axle BB shell. ROTOR conceived its Universal Bottom Bracket (UBB) concept to eliminate the complicated bottom bracket/crank compatibility challenge that has increasingly frustrated the mechanics at your LBS. The Press Fit 4624 is the yes component to Is this compatible with my press fit 46mm diameter BB shell for a 24mm axle? Features: 100% CNC-machined, 7075 aluminum Silicone seals and center sleeve Specifications: Bearing Type: Steel