PF30 Threaded Angular Contact BB for Fat BikeFits frames with PF30 x 100mm bottom bracket shellMachined cups thread together for stability, increased bearing life, and simple installation and maintenance*Note: Some cranks designed for 100mm BB shell widths and external bearings may not work**Note: Additional crank spindle spacers may need to be added, or replace the original spacers with narrower crank spindle spacersFor more information see the links tab below100mmPF3030mmAlloy130gBlack