Wheels Manufacturing PressFit 30 Bottom Bracket with Ceramic Bearings Enduro 6806 (30mm ID) ABEC 5 Ceramic Hybrid bearings; Dual silicone seal keeps the contamination out for longer life Adaptable BB to fit PressFit 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 MANUFACTURING Universal adapters Red anodized, machined aluminum shell Made in the USA