A central movement built to outlast the frame. BB ALPHA features hand-assembled, hardened stainless steel races with Grade 3 silicon nitride balls, custom-designed seals, and precision dust covers, offering up to 500% more protection from moisture while ensuring ultra-low friction performance. The simplified spacer tube design and lighter cartridges ensure quick installation and a 10% weight reduction compared to previous generations. All CeramicSpeed BB ALPHA models are covered by a lifetime warranty. Precisely match a crank with a 30mm spindle of appropriate length to a 42mm wide, 68mm pressfit shell with bearings pressed directly into the frame, commonly referred to as BB30, by selecting this high-quality CeramicSpeed bearing kit. In the package: BB ALPHA Bearing Kit for BB30 Road Bold UFO TECH All Round 5 ml Adhesive