PF30 Threaded Angular Contact BB for Fat Bike. Fits Specialized Fatboy frames, and any other brand frames with PF30 x 100mm bottom bracket shell. Machined cups thread together for stability, increased bearing life, and simple installation and maintenance. No more creaking. Smooth operation. Fast bearing replacement. – Bearings: Enduro ABEC-3 – Color: Black – Bottom Bracket/Frame Interface: PF30 – Bottom Bracket Shell Width (mm): 100mm – Bottom Bracket Shell I.D.: 46mm – Crank Spindle Type: BB30 – Crank Spindle Diameter: 30mm – Weight: 130g