Wheels Manufacturing Press Fit 30 Bottom Bracket The heart of every bottom bracket is the bearings themselves. That is why Wheels Manufacturing utilizes Enduro brand bearings in all of their PF 30 offerings. This USA bottom bracket features Enduro ABEC 3 sealed bearings with dual silicone seals to keep dirt and grime out of your bearings. They will extend the life of the bearings and reduce the need for maintenance. It is a direct replacement for SRAM, FSA, and other pressfit 30 bottom brackets Features:Made in the USAAnodized black, machined aluminum shell Enduro 6806 OS (30mm ID) ABEC 3 sealed bearings12% increase in static load rating compared to standard 6806 bearings Dual silicone seal keeps the contamination out for longer life Adaptable BB to fit Press Fit 30 specific frames (46mm ID) with shell widths from 61mm to 86. 5mm Will accept current 30mm spindle cranksets, as well as 24mm and 24/22mm cranksets using Wheels Mfg. adapter shims (Not Included, See below)Direct replacement for SRAM, FSA, and other pressfit 30 bottom brackets. Find spindle adapters here Spindle adapters | Wheels Manufacturing | Pf30 To Bb30 Bb Blk, Pf30 To Bb30 Spindle, Abec Bearing