This Bottom Bracket is when you have a PF30 shell frame and want to install a BB30 crankset into the frame. All have a 46mm inner diameter and smooth insides, to a frame width of 68mm and a total of 86mm with the BB installed. The crank has a 30mm diameter spindle.

Our Gravel bottom brackets are built with CeramicSpeed Coated bearings and equipped with UFO Long Life Grease for the ultimate in durability and protection in all environments

This bottom bracket features nearly zero loss of power due to friction, thanks to the bearings. The bearings have super round, super smooth CeramicSpeed balls rolling on hardened-steel races. The Coated version has a metallic coating laid onto the races, making them even harder and smoother, resulting in longer life and lower drag. They come installed in cups.