Birzman Bike Bottom Brackets, Bearings, Tools, & Parts

you all of the same benefits as their well-loved Outboard style bottom brackets. The two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, ...

Weighing in at 77g, the SM-BBR60 Ultegra Bottom Bracket is 14 grams lighter than the 6700 bottom bracket offering professional level technology for the everyday cyclist.

a snug & secure fit that also fully protects the face of the bearing delivers exceptional performance without any sacrifices. CeramicSpeed hand-built bearings carry the load from crank to frame with un-paralleled ...

Bracket utilizes high tolerances, weatherproofing, and superb bearings to create an extremely durable, smooth component. CNC machined bearing cups provide a better fit than plastic and reduce creaking found in lesser products. ...

a bearing made of 440C stainless steel, providing exceptional ride quality and reliability. The stainless steel bearing in the Hellbender 70 strikes a perfect balance between value and lasting performance. Providing excellent ...