PF30 Threaded Angular Contact BB for Fat Bike. Fits 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. Use only bottom bracket tools compatible with 16-notch MegoEvo BB’s. (FSA MegaEvo and Park Tool BBT-29).