BB86 threaded BB for Fat Bike PF41. 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: PF41 – BB121, PF41 – BB132 – Bottom Bracket Shell Width (mm): 121mm – 132mm – Bottom Bracket Shell I.D.: 41mm – Crank Spindle Type: SRAM / Truvativ GXP – Crank Spindle Diameter: 22/24mm – Weight: 120g