Wheels Mfg Outboard BSA 30 Threaded Bottom Bracket - Angular Contact Bearingssolution for running a 30mm spindle crankset in a BSA threaded frame. Machined aluminum cups thread in to a standard threaded frame and feature Enduro 6806 ABEC 3 or Enduro 6806 Angular Contact sealed bearings outboard of the BB shell. Fully serviceable Bearings: Enduro ABEC 3 or Angular Contact Bearings (ACB) Bottom Bracket Frame Interface: ISO English or BSA Threaded (1. 37 in x 24 TPI) Bottom Bracket Shell Width: 68mm Bottom Bracket Shell I. D.: